pluralism Look up pluralism at Dictionary.com
1818, as a term in church administration, from plural (q.v.) + -ism. Attested from 1882 as a term in philosophy for a theory which recognizes more than one ultimate principle. In political science, attested from 1919 (in Harold J. Laski) in sense "theory which opposes monolithic state power." Gen. sense of "toleration of diversity within a society or state" is from 1933.
plural Look up plural at Dictionary.com
late 14c., from O.Fr. plurel "more than one" (12c.), from L. pluralis "of or belonging to more than one," from plus (gen. pluris) "more" (see plus).
child Look up child at Dictionary.com
O.E. cild "child," from P.Gmc. *kiltham (source of Gothic kilşei "womb"), unrelated to other languages. Also in O.E. meaning "a youth of gentle birth" (archaic, usually written childe). In 16c., especially "girl child." The difficulty with the plural began in O.E., where the nom. pl. was at first cild, identical with the sing., then c.975 pl. form cildru (gen. cildra) arose, only to be re-pluraled c.1175 as children, which is thus a double plural. M.E. plural cildre survives in Lancashire dialect childer and in Childermas (c.1000) "festival of the Holy Innocents" (Dec. 28).
areolas Look up areolas at Dictionary.com
nativized plural of areola (q.v.), which has its proper plural in areolae (see -ae).
alumnus Look up alumnus at Dictionary.com
1640s, from L. "a pupil," lit. "foster son," vestigial present passive participle of alere "to nourish" (see old), with ending akin to Gk. -omenos. Plural is alumni. Fem. is alumna (1882), fem. plural alumnae.
octopus Look up octopus at Dictionary.com
1758, genus name of a type of eight-armed cephalopod mollusks, from Gk. oktopous "eight-footed," from okto "eight" (see eight) + pous "foot." Proper plural is octopodes, though octopuses probably works better in English. Octopi is from mistaken assumption that -us is the L. noun ending that takes -i in plural.
this Look up this at Dictionary.com
O.E. şis, neuter demonstrative pronoun and adj. (masc. şes, fem. şeos), probably from a North Sea Gmc. pronoun formed by combining the base *şa- (see that) with -s, which is probably identical with O.E. se "the" (representing here "a specific thing"), but it may be O.E. seo, imperative of see (v.) "to behold." Cf. O.S. these, O.N. şessi, Du. deze, O.Fris. this, O.H.G. deser, Ger. dieser. Once fully inflected, with 10 distinct forms (see table below); the oblique cases and other genders gradually fell away by 15c. The O.E. plural was şæs (nom. and acc.), which in Northern M.E. became thas, and in Midlands and Southern England became thos. The Southern form began to be used late 13c. as the plural of that (replacing M.E. tho, from O.E. şa) and acquired an -e (apparently from the influence of M.E. adj. plurals in -e; cf. alle from all, summe from sum "some"), emerging early 14c. as modern those. About 1175 thes (probably a variant of O.E. şæs) began to be used as the plural of this, and by 1200 it had taken the form these, the final -e acquired via the same mechanism that gave one to those.

Masc.Fem.Neut.Plural
Nom.şesşeosşisşas
Acc.şisneşasşisşas
Gen.şissesşisseşissesşissa
Dat.şissumşisseşissumşissum
Inst.şysşisseşysşissum
dice Look up dice at Dictionary.com
early 14c., des, dys, plural of dy (see die (n.)), altered 14c. to dyse, dyce, and 15c. to dice. "As in pence, the plural s retains its original breath sound, probably because these words were not felt as ordinary plurals, but as collective words" [OED]. Sometimes used as singular 1400-1700. The verb "to cut into cubes" is first recorded late 14c. Dicey "doubtful, difficult" is RAF slang from the 1940s.
kine Look up kine at Dictionary.com
archaic plural of "cow," actually a double plural (cf. children) or a gen. pl. of M.E. kye "cows," from O.E. cy, pl. of cu "cow."
tweezers Look up tweezers at Dictionary.com
1654, extended from tweezes, plural of tweeze "case for tweezers" (1622), aphetic of etweese, considered as plural of etwee (1611) "a small case," from Fr. étui "small case," originally "a keeping safe," from O.Fr. estuier "to keep, shut up, imprison," of uncertain origin. Sense transf. from the case to the implement inside it. The verb tweeze "to pluck with tweezers" is a 1932 back-formation.
triumvir Look up triumvir at Dictionary.com
"one of three men in the same office or of the same authority," 1579, from L. triumvir, from Old L. phrase trium virum, genitive plural of tres viri "three men," from tres "three" + viri, plural of vir "man" (see virile). Triumvirate is from 1584.
-'s Look up -'s at Dictionary.com
suffix forming the possessive case of most Mod.Eng. nouns, was gradually extended in M.E. from O.E. -es, the most common genitive inflection of masc. and neut. nouns (cf. dæg "day," gen. dæges "day's"). But O.E. also had genitives in -e, -re, -an as well as "mutation-genitives" (cf. boc "book," plural bec), and the -es form was never used in plural (where -a, -ra, -na prevailed), thus avoiding the ambiguity of words like kings'. As a suffix forming some adverbs, it represents the gen. sing. ending of O.E. masc. and neuter nouns and some adjectives.
news Look up news at Dictionary.com
1382, plural of new (n.) "new thing," from new (adj.), q.v.; after Fr. nouvelles, used in Bible translations to render M.L. nova (neut. pl.) "news," lit. "new things." Sometimes still regarded as plural, 17c.-19c. Meaning "tidings" is 1423; newspaper is first attested 1670, though the thing itself is much older. Newsreel was first recorded 1916; newscast is from 1930. Newsletter is attested from 1674, but fell from use until it was revived 20c. Newsworthy first attested 1932. The News in the Virginia city Newport News is said to derive from the name of one of its founders, William Newce.
eye Look up eye at Dictionary.com
O.E. ege (Mercian), eage (W. Saxon), from P.Gmc. *augon, from PIE *oqw- "to see" (cf. Skt. akshi "the eye, the number two," Gk. opsis "a sight," Goth. augo, O.C.S. oko, Lith. akis, L. oculus, Armenian aku). Until late 14c. the plural was in -an, hence modern dial. plural een, ene. The verb is first recorded 1560s. The eye of a needle was in O.E.; to see eye to eye is from Isa. lii.8; eyewitness is from 1530s. Eyebrow is from 1580s (O.E. eagbræw meant "eyelid"); eyelash from 1752; eyelid first attested mid-13c. Eye-opener "anything that informs and enlightens" is from 1863. Have an eye on "keep under supervision" is attested from early 15c.
-acea Look up -acea at Dictionary.com
suffix denoting orders and classes in zoology, from L. -acea, neut. pl. of -aceus "belonging to, of the nature of" (enlarged from adj. suffix -ax, gen. -acis); neut. pl. because of a presumed animalia, a neuter plural noun. Thus, crustacea "shellfish" are *crustacea animalia "crusty animals." In botany, the suffix is -aceae, from the fem. pl. of -aceus, with reference to L. plantae, which is a fem. plural.
-s (1) Look up -s at Dictionary.com
suffix forming almost all Mod.Eng. plural nouns, was gradually extended in M.E. from O.E. -as, the nom. plural and acc. plural ending of certain "strong" masc. nouns (cf. dæg "day," nom./acc. pl. dagas "days"). The commonest Gmc. declension, traceable back to the original PIE inflection system, it is also the source of the Du. -s plurals and (by rhotacism) Scand. -r plurals (e.g. Swed. dagar). Much more uniform today than originally; O.E. also had a numerous category of "weak" nouns that formed their plurals in -an, and other strong nouns that formed plurals with -u. Quirk and Wrenn, in their O.E. grammar, estimate that 45 percent of the nouns a student will encounter will be masc., nearly four-fifths of them with gen. sing. -es and nom./acc. pl. in -as. Less than half, but still the largest chunk. The triumphs of -'s possessives and -s plurals represent common patterns in language: using only a handful of suffixes to do many jobs (cf. -ing), and the most common variant squeezing out the competition. To further muddy the waters, it's been extended in slang since 1936 to singulars (e.g. ducks, sweets, babes) as an affectionate or dim. suffix. O.E. single-syllable collectives (sheep, folk) as well as weights, measures, and units of time did not use -s. The use of it in these cases began in M.E., but the older custom is preserved in many traditional dialects (ten pound of butter; more than seven year ago).
both Look up both at Dictionary.com
There are several theories, all similar, and deriving the word from the tendency to say "both the." One is that it is O.E. begen (masc.) "both" (from P.Gmc. *ba, from PIE *bho "both") + extended base. Another traces it to the P.Gmc. formula represented in O.E. by ba şa "both these," from ba (feminine nominative and accusative of begen) + şa, nominative and accusative plural of se "that." A third traces it to O.N. bağir "both," from *bai thaiz "both the," from P.Gmc. *thaiz, third person plural pronoun.
barracks Look up barracks at Dictionary.com
plural, and usual, form of barrack (q.v.).
strata Look up strata at Dictionary.com
c.1700, plural of stratum.
appendices Look up appendices at Dictionary.com
proper L. plural of appendix (q.v.).
criteria Look up criteria at Dictionary.com
1620s, plural of criterion (q.v.).
delicacies Look up delicacies at Dictionary.com
"things dainty and gratifying to the palate," mid-15c., from plural of delicacy.
teens Look up teens at Dictionary.com
1673 (plural), formed from -teen, taken as a separate word.
shay Look up shay at Dictionary.com
1717, back-formation from chaise (q.v.) mistaken as a plural.
children Look up children at Dictionary.com
plural of child (q.v.)
feet Look up feet at Dictionary.com
plural of foot (q.v.).
teeth Look up teeth at Dictionary.com
plural of tooth (q.v.).
women Look up women at Dictionary.com
plural of woman (q.v.).
foci Look up foci at Dictionary.com
plural of focus (q.v.).
feelings Look up feelings at Dictionary.com
"tender or sensitive side of one's nature," 1771, from plural of feeling.
tooth Look up tooth at Dictionary.com
O.E. toğ (plural teğ), from P.Gmc. *tanth, *tunth (cf. O.S., Dan., Swed., Du. tand, O.N. tönn, O.Fris. toth, O.H.G. zand, Ger. Zahn, Goth. tunşus), from PIE *dont-/*dent- "tooth" (cf. Skt. danta, Gk. odontos, L. dens, Lith. dantis, O.Ir. det, Welsh dent). Plural form teeth is an instance of i-mutation. Application to tooth-like parts of other objects (saws, combs, etc.) first recorded 1520s. Toothache is attested from late 14c. Toothbrush is first recorded 1650s; toothpaste first attested 1832; toothpick is from late 15c. Toothsome "pleasant to the taste" is c.1565; the fig. sense of "attractive" (1550s) is a bit older.
thou Look up thou at Dictionary.com
2nd nominative singular personal pronoun, O.E. şu, from P.Gmc. *thu (cf. O.Fris. thu, M.Du., M.L.G. du, O.H.G., Ger. du, O.N. şu, Goth. şu), from PIE *tu-, second person singular pronoun (cf. L. tu, Ir. tu, Welsh ti, Gk. su, Lith. tu, O.C.S. ty, Skt. twa-m). Superseded in M.E. by plural form you (from a different root), but retained in certain dialects (e.g. Philadelphia Quakers). The plural at first was used in addressing superior individuals, later also (to err on the side of propriety) strangers, and ultimately all equals. By c.1450 the use of thou to address inferiors gave it a tinge of insult unless addressed by parents to children, or intimates to one another. Hence the verb meaning "to use 'thou' to a person" (c.1440).
"Avaunt, caitiff, dost thou thou me! I am come of good kin, I tell thee!" ["Hickscorner," c.1530]
A brief history of the second person pronoun in Eng. can be found here.
condolences Look up condolences at Dictionary.com
"formal declaration of sympathy," 1670s, pl. of condolence. Reason for the plural is unclear; earliest references are to expressions from groups of persons; perhaps the habit stuck.
cheval de frise Look up cheval de frise at Dictionary.com
1688, from Fr., lit. "horse of Frisia," because it was first employed there as a defense against cavalry. Plural chevaux de frise.
am Look up am at Dictionary.com
O.E. eom "to remain," (Mercian eam, Northumbrian am), from PIE *esmi- (cf. O.N. emi, Goth. im, Hittite esmi, O.C.S. jesmi, Lith. esmi), from base *es-, *s-, the S-ROOT, which also yielded Gk. esti-, L. est, Skt. as-, and Ger. ist. In O.E. it existed only in present tense, all other forms being expressed in the W-BASE (see were, was). This cooperative verb is sometimes referred to by linguists as *es-*wes-. Until the distinction broke down 13c., *es-*wes- tended to express "existence," with beon meaning something closer to "come to be" (see be). O.E. am had two plural forms: 1. sind/sindon, sie and 2. earon/aron The s- form (also used in the subjunctive) fell from use in the early 13c. (though it continues in Ger. sind, the 3rd person plural of "to be") and was replaced by forms of be, but aron (aren, arn, are, from P.Gmc. *ar-, probably a variant of PIE base *es-) continued, and as am and be merged it encroached on some uses that previously had belonged to be. By the early 1500s it had established its place in standard Eng. Art became archaic in the 1800s.
be Look up be at Dictionary.com
O.E. beon, beom, bion "be, exist, come to be, become," from P.Gmc. *beo-, *beu-. This "b-root" is from PIE base *bheu-, *bhu- "grow, come into being, become," and in addition to the words in English it yielded German present first and second person sing. (bin, bist, from O.H.G. bim "I am," bist "thou art"), L. perf. tenses of esse (fui "I was," etc.), O.C.S. byti "be," Gk. phu- "become," O.Ir. bi'u "I am," Lith. bu'ti "to be," Rus. byt' "to be," etc. It also is behind Skt. bhavah "becoming," bhavati "becomes, happens," bhumih "earth, world."

The modern verb in its entirety represents the merger of two once-distinct verbs, the "b-root" represented by be and the am/was verb, which was itself a conglomerate. Roger Lass ("Old English") describes the verb as "a collection of semantically related paradigm fragments," while Weekley calls it "an accidental conglomeration from the different Old English dial[ect]s." It is the most irregular verb in Mod.E. and the most common. Collective in all Germanic languages, it has eight different forms in Modern English:

BE (infinitive, subjunctive, imperative)
AM (present 1st person singular)
ARE (present 2nd person singular and all plural)
IS (present 3rd person singular)
WAS (past 1st and 3rd persons singular)
WERE (past 2nd person singular, all plural; subjunctive)
BEING (progressive & present participle; gerund)
BEEN (perfect participle).

The paradigm in O.E. was:

SING.PL.
1st pres.ic eom
ic beo
we sind(on)
we beoğ
2nd pres.şu eart
şu bist
ge sind(on)
ge beoğ
3rd pres.he is
he biğ
hie sind(on)
hie beoğ
1st pret.ic wæswe wæron
2nd pret.şu wærege waeron
3rd pret.heo wæshie wæron
1st pret. subj.ic wærewe wæren
2nd pret. subj.şu wærege wæren
3rd pret. subj.Egcferğ wærehie wæren


The "b-root" had no past tense in O.E., but often served as future tense of am/was. In 13c. it took the place of the infinitive, participle and imperative forms of am/was. Later its plural forms (we beth, ye ben, they be) became standard in M.E. and it made inroads into the singular (I be, thou beest, he beth), but forms of are claimed this turf in the 1500s and replaced be in the plural. For the origin and evolution of the am/was branches of this tangle, see am and was.
"That but this blow Might be the be all, and the end all." ["Macbeth" I.vii.5]
Kansas Look up Kansas at Dictionary.com
1722, from Fr., variant of Kansa, native name of a Siouan people. It is a plural (see Arkansas).
'em Look up 'em at Dictionary.com
M.E., now taken as an abbreviation of them, but originally a form of hem, dative and accusative of the third person plural pronoun.
Massachusetts Look up Massachusetts at Dictionary.com
plural, originally (1614) in ref. to the Algonquian native people who lived around the bay, from Algonquian Massachusett "at the large hill," in ref. to Great Blue Hill, southwest of Boston.
mandamus Look up mandamus at Dictionary.com
1530s, "writ from a superior court to an inferior one, specifying that something be done," (late 14c. in Anglo-Fr.), from L., lit. "we order," first person plural pres. indicative of mandare "to order" (see mandate).
klezmer Look up klezmer at Dictionary.com
late 19c. (plural klezmorim); originally, "an itinerant East European Jewish professional musician," from Heb. kley zemer, lit. "vessels of song," thus "musical instruments."
mace (2) Look up mace at Dictionary.com
"spice made from dry outer husk of nutmeg," late 14c., from O.Fr. macis (in Eng. taken as a plural), sometimes said to be a scribal error for L. macir, a red spicy bark from India, but OED finds this etymology unlikely.
wegotism Look up wegotism at Dictionary.com
1797, from we + egotism; "an obtrusive and too frequent use of the first person plural by a speaker or writer" [OED].
whisker Look up whisker at Dictionary.com
"hair of a man's face" (usually plural), c.1600, originally a playful formation, from M.E. wisker "anything that whisks or sweeps" (early 15c.); see whisk (v.). In ref. to animal lip hair, recorded from 1670s.
outskirt Look up outskirt at Dictionary.com
"outer border," 1596, from out + skirt (q.v.). Now only in plural. Originally in Spenser.
slather (v.) Look up slather at Dictionary.com
"spread liberally," 1866 (in Mark Twain), from a noun meaning "large amount" (usually as plural, slathers), first attested 1857; a dialectal word of uncertain origin, perhaps from Ir. sliotar.
scads Look up scads at Dictionary.com
"large amounts," 1869, Amer.Eng., earlier "dollar" (1858, usually in plural), of uncertain origin. Unknown connection to scad (c.1600), a Cornish name for a type of fish abundant on the British coast, which probably is a variant of shad (q.v.).
pence Look up pence at Dictionary.com
1393, contraction of penies, collective plural of penny.
fluke (1) Look up fluke at Dictionary.com
"flat end of an arm of an anchor," 1561, perhaps from fluke (3) on resemblance of shape, or from L.Ger. flügel "wing." Meaning "whale's tail" (in plural) is 1725.
tibia Look up tibia at Dictionary.com
lower leg bone, 1726, from L. tibia "shinbone," also "pipe, flute," in which sense it originally came into English (1540s). Of unknown origin. The Latin plural is tibiæ.