be- Look up be- at Dictionary.com
word-forming element with a wide range of meaning: "thoroughly, completely; to make, cause seem; to provide with; at, on, to, for," from Old English be- "on all sides" (also used to make transitive verbs and as a privative or intensive prefix), from weak form of Old English bi "by," probably cognate with second syllable of Greek amphi, Latin ambi and originally meaning "about" (see ambi-).

This sense naturally drifted into intensive (as in bespatter "spatter about," therefore "spatter very much"). Be- can also be privative (as in behead), causative, or have just about any sense required. The prefix was productive 16c.-17c. in forming useful words, many of which have not survived, such as bethwack "to thrash soundly" (1550s), betongue "to assail in speech, to scold" (1630s).
be (v.) Look up be at Dictionary.com
Old English beon, beom, bion "be, exist, come to be, become, happen," from Proto-Germanic *biju- "I am, I will be." This "b-root" is from PIE root *bheue- "to be, exist, grow, come into being," and in addition to the words in English it yielded German present first and second person singular (bin, bist, from Old High German bim "I am," bist "thou art"), Latin perfective tenses of esse (fui "I was," etc.), Old Church Slavonic byti "be," Greek phu- "become," Old Irish bi'u "I am," Lithuanian bu'ti "to be," Russian byt' "to be," etc. It also is behind Sanskrit bhavah "becoming," bhavati "becomes, happens," bhumih "earth, world."

The modern verb to be 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 Modern English 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 Old English was:

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


The "b-root" had no past tense in Old English, 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 Middle English 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]
be-all (n.) Look up be-all at Dictionary.com
see be.
be-in (n.) Look up be-in at Dictionary.com
"a public gathering of hippies" [OED], 1967, from be + in.
beam (n.) Look up beam at Dictionary.com
Old English beam originally "living tree," but by late 10c. also "rafter, post, ship's timber," from Proto-Germanic *baumaz (cognates: Old Norse baðmr, Old Frisian bam "tree, gallows, beam," Middle Dutch boom, Old High German boum, German Baum "tree," Gothic bagms), perhaps from PIE verb root *bheue- "to grow" (see be). The shift from *-au- to -ea- is regular in Old English.

Meaning "ray of light" developed in Old English, probably because it was used by Bede to render Latin columna lucis, the Biblical "pillar of fire." Nautical sense of "one of the horizontal transverse timbers holding a ship together" is from early 13c., hence "greatest breadth of a ship," and slang broad in the beam "wide-hipped" (of persons). To be on the beam (1941) was originally an aviator's term for "to follow the course indicated by a radio beam."
been (v.) Look up been at Dictionary.com
past participle of be. Dismissive slang phrase been there, done that attested from 1994 (been there "had the experience," usually of something disreputable, is from 1880s).
begin (v.) Look up begin at Dictionary.com
Old English beginnan "to begin, attempt, undertake," a rare word beside the more usual form onginnan (class III strong verb; past tense ongann, past participle ongunnen); from bi- (see be-) + West Germanic *ginnan, of obscure meaning and found only in compounds, perhaps "to open, open up" (compare Old High German in-ginnan "to cut open, open up," also "begin, undertake"), with sense evolution from "open" to "begin." Cognates elsewhere in Germanic include Old Frisian biginna "to begin," Middle Dutch beghinnen, Old High German beginnan, German beginnen, Old Frisian bijenna "to begin," Gothic duginnan.
beside (prep.) Look up beside at Dictionary.com
Old English be sidan "by the side of" (only as two words), from be- + sidan dative of side (n.). By 1200, formed as one word and used as both adverb and preposition. The alternative Middle English meaning "outside" led to the sense preserved in beside oneself "out of one's wits" (late 15c.).
bewray (v.) Look up bewray at Dictionary.com
early 13c., "to inform against;" mid-13c., "to speak ill of," biwreien from be- + Middle English wreien. "betray," from Old English wregan. Sense of "to reveal, expose" is from late 14c. "Probably more or less of a conscious archaism since the 17th c." [OED] Related: Bewrayed; bewraying.
below (adv.) Look up below at Dictionary.com
early 14c., biloogh, from be- "by, about" + logh, lou, lowe "low" (see low (adj.)). Apparently a variant of earlier a-lowe (influenced by other adverbs in be-; see before), the parallel form to an-high (now on high). Beneath was the usual word; below was very rare in Middle English and gained currency only in 16c. It is frequent in Shakespeare. As a preposition from 1570s. According to Fowler, below is the opposite of above and concerns difference of level and suggests comparison of independent things. Under is the opposite of over and is concerned with superposition and subjection and suggests some interrelation.
bedim (v.) Look up bedim at Dictionary.com
1560s, from be- + dim (adj.). Related: Bedimmed; bedimming.
bewig (v.) Look up bewig at Dictionary.com
1714, from be- + wig (n.). Related: Bewigged; bewigging.
beneath (adv., adj.) Look up beneath at Dictionary.com
Old English beneoðan "beneath, under, below," from be- "by" + neoðan "below," originally "from below," from Proto-Germanic *niþar "lower, farther down, down" (see nether). Meaning "unworthy of" is attested from 1849 (purists prefer below in this sense). "The be- gave or emphasized the notion of 'where,' excluding that of 'whence' pertaining to the simple niðan" [OED].
besot (v.) Look up besot at Dictionary.com
"affect with a foolish manifestation," 1570s, from be- + sot. Related: Besotted; besotting.
between (prep.) Look up between at Dictionary.com
Old English betweonum "between, among, by turns," Mercian betwinum, from bi- "by" (see be-) + tweonum dative plural of *tweon "two each" (compare Gothic tweih-nai "two each"). Between a rock and a hard place is from 1940s, originally cowboy slang. Between-whiles is from 1670s.
betwixt (prep., adv.) Look up betwixt at Dictionary.com
Old English betweox "between, among, amidst, meanwhile," from bi- "by" (see be-) + tweox "for two," from Proto-Germanic *twa "two" + *-isk "-ish." With parasitic -t that first appeared in Old English and became general after c. 1500.
being (n.) Look up being at Dictionary.com
c. 1300, "condition, state, circumstances; presence, fact of existing," early 14c., existence," from be + -ing. Sense of "that which physically exists, person or thing" (as in human being) is from late 14c.
beget (v.) Look up beget at Dictionary.com
Old English begietan "to get by effort, find, acquire, attain, seize" (class V strong verb, past tense begeat, past participle begeaton), from be- + get (v.). Sense of "to procreate" is from c. 1200. Related to Old High German pigezzan, Gothic bigitan "to get, obtain." Related: Begot; begotten.
belie (v.) Look up belie at Dictionary.com
Old English beleogan "to deceive by lies," from be- + lie (v.1) "to lie, tell lies." Current sense of "to contradict as a lie" is first recorded 1640s. The other verb lie once also had a formation like this, from Old English belicgan, which meant "to encompass, beleaguer," and in Middle English was a euphemism for "to have sex with" (i.e. "to lie with carnally").
befit (v.) Look up befit at Dictionary.com
mid-15c., from be- + fit (v.). Related: Befitted; befitting.
bet Look up bet at Dictionary.com
1590s, as both a verb and noun, in the argot of petty criminals, of unknown origin; probably a shortening of abet or else from obsolete beet "to make good," from Old English bætan "make better, arouse, stimulate," from Proto-Germanic *baitjan, in which case the verb would be the original. The original notion is perhaps "to improve" a contest by wagering on it, or it is from the "bait" sense in abet. Used since 1852 in various American English slang assertions (compare you bet "be assured," 1857). Related: Betting.
belay (v.) Look up belay at Dictionary.com
"to secure or fasten," from Old English bilecgan, which, among other senses, meant "to lay a thing about" (with other objects), from be- + lecgan "to lay" (see lay (v.)). The only surviving sense is the nautical one of "coil a running rope round a cleat or pin to secure it" (also transferred to mountain-climbing), first attested 1540s; but this is possibly a cognate word, from Dutch beleggen.
bee (n.) Look up bee at Dictionary.com
stinging insect, Old English beo "bee," from Proto-Germanic *bion (cognates: Old Norse by, Old High German bia, Middle Dutch bie), possibly from PIE root *bhi- "quiver." Used metaphorically for "busy worker" since 1530s.

Sense of "meeting of neighbors to unite their labor for the benefit of one of their number," 1769, American English, probably is from comparison to the social activity of the insect; this was extended to other senses (such as spelling bee, first attested 1809; Raising-bee (1814) for building construction; also hanging bee "a lynching"). To have a bee in (one's) bonnet (1825), said of one who is harebrained or has an intense new notion or fancy, is said in Jamieson to be Scottish, perhaps from earlier expressions such as head full of bees (1510s), denoting mad mental activity.
well-being (n.) Look up well-being at Dictionary.com
1610s, from well (adv.) + gerundive of be.
bedeck (v.) Look up bedeck at Dictionary.com
1560s, from be- + deck (v.). Related: Bedecked; bedecking.
begone (v.) Look up begone at Dictionary.com
late 14c., contracted from be (imperative) + gone.
becalm (v.) Look up becalm at Dictionary.com
1550s, from be- + calm. Related: Becalmed; becalming.
begird (v.) Look up begird at Dictionary.com
Old English begyrdan; see be- + gird (v.).
bedaub (v.) Look up bedaub at Dictionary.com
1550s, from be- + daub (v). Related: Bedaubed; bedaubing.
betake (v.) Look up betake at Dictionary.com
c. 1200, from be- + take. Related: Betook; betaken.
beknow (v.) Look up beknow at Dictionary.com
c. 1300, "to become acquainted with; to be aware or conscious of," from be- + know (v.). Related: Beknown; beknowing.
befoul (v.) Look up befoul at Dictionary.com
early 14c., from be- + foul (v.). Related: Befouled; befouling.
bestir (v.) Look up bestir at Dictionary.com
Old English bestyrian "to heap up," from be- + stir. Related: Bestirred; bestirring.
betide (v.) Look up betide at Dictionary.com
"to happen, befall," late 12c., from be- + tiden "to happen" (see tide).
bewail (v.) Look up bewail at Dictionary.com
c. 1300, from be- + wail (v.). Related: Bewailed; bewailing.
befool (v.) Look up befool at Dictionary.com
late 14c., from be- + fool (n.). Related: Befooled; befooling.
beseem (v.) Look up beseem at Dictionary.com
early 13c., from be- + seem (v.). Related: Beseemed; beseeming.
benumb (v.) Look up benumb at Dictionary.com
late 15c., from be- + numb. Originally of mental states; of the physical body from 1520s. Related: Benumbed; benumbing.
bestow (v.) Look up bestow at Dictionary.com
early 14c., bistowen "give" (as alms, etc.), from be- + stowen "to place" (see stow). Related: Bestowed; bestowing; bestower.
bemoan (v.) Look up bemoan at Dictionary.com
Old English bemænan "to bemoan, wail, lament;" see be- + moan (v.). Related: Bemoaned; bemoaning.
beweep (v.) Look up beweep at Dictionary.com
Old English bewepan, cognate with Old Frisian biwepa, Old Saxon biwopian; see be- + weep. Related: Bewept.
befall (v.) Look up befall at Dictionary.com
Old English befeallan "to deprive of; fall to, be assigned to; befall," from be- "by, about" + feallan (see fall). Compare Old Frisian bifalla, Old Saxon, Old High German bifallan, German befallen. Related: Befell; befalling.
beyond (prep.) Look up beyond at Dictionary.com
Old English begeondan "beyond, from the farther side," from be- "by," here probably indicating position, + geond "yonder" (prep.); see yond. A compound not found elsewhere in Germanic.
bemuse (v.) Look up bemuse at Dictionary.com
"to make utterly confused," from be- + muse (compare amuse); attested from 1735 but probably older, as Pope (1705) punned on it as "devoted utterly to the Muses."
beleaguer (v.) Look up beleaguer at Dictionary.com
1580s, from Dutch or Low German belegeren "to besiege," from be- "around" (see be-) + legeren "to camp," from leger "bed, camp, army, lair," from Proto-Germanic *leg-raz-, from PIE *legh-to- "lie" (see lie (v.2)). A word from the Flemish Wars (cognates: Swedish belägra, Dutch belegeren "besiege," German Belagerung "siege"). Spelling influenced by league. Related: Beleaguered; beleaguering.
become (v.) Look up become at Dictionary.com
Old English becuman "happen, come about," also "meet with, arrive," from Proto-Germanic *bikweman "become" (cognates: Dutch bekomen, Old High German biqueman "obtain," German bekommen, Gothic biquiman). A compound of be- and come; it drove out Old English weorðan. Meaning "to look well" is early 14c., from earlier sense of "to agree with, be fitting" (early 13c.).
behave (v.) Look up behave at Dictionary.com
early 15c., from be- intensive prefix + have in sense of "to have or bear (oneself) in a particular way, comport" (compare German sich behaben, French se porter). Cognate Old English compound behabban meant "to contain," and alternatively the modern sense of behave might have evolved from behabban via a notion of "self-restraint." Related: Behaved; behaving.
behold (v.) Look up behold at Dictionary.com
Old English bihaldan (West Saxon behealdan) "give regard to, hold in view," also "to keep hold of, to belong to," from be- + haldan, healdan (see hold). Related: Beheld; beholding. A common West Germanic compound, compare Old Saxon bihaldan "hold, keep," Old Frisian bihalda, Old High German bihaltan, German behalten, but "[t]he application to watching, looking, is confined to English" [OED].
behoof (n.) Look up behoof at Dictionary.com
c. 1200, "use, benefit, advantage;" Old English had bihoflic "useful," implying *bihof "advantage, utility;" from Proto-Germanic *bi-hof "that which binds, requirement, obligation" (cognates: Old Frisian bihof "advantage," Dutch behoef, Middle High German bihuof "useful thing," German Behuf "benefit, use, advantage"). In the common Germanic compound, the first element, likely intensive, is cognate with be- and the second with Old English hof, past tense of hebban "to raise" (see heave (v.)). The original sense is perhaps, then, "taking up (for oneself)."
betoken (v.) Look up betoken at Dictionary.com
late 12c., from be- + Old English tacnian "to signify," from tacn "sign" (see token). Related: Betokened; betokening.