integrated (adj.) Look up integrated at Dictionary.com
1580s, "combined into a whole," past participle adjective from integrate (v.). Sense of "desegregated, not or no longer divided by race, etc." is from 1947.
integration (n.) Look up integration at Dictionary.com
1610s, "act of bringing together the parts of a whole," from French intégration and directly from Late Latin integrationem (nominative integratio) "renewal, restoration," noun of action from past participle stem of Latin integrare "make whole," also "renew, begin again" (see integrate). Anti-discrimination sense (opposed to segregation) is recorded from 1934.
integrity (n.) Look up integrity at Dictionary.com
c. 1400, "innocence, blamelessness; chastity, purity," from Old French integrité or directly from Latin integritatem (nominative integritas) "soundness, wholeness, completeness," figuratively "purity, correctness, blamelessness," from integer "whole" (see integer). Sense of "wholeness, perfect condition" is mid-15c.
integument (n.) Look up integument at Dictionary.com
1610s, from Latin integumentum "a covering," from integere "to cover over," from in- "in, upon" (see in- (2)) + tegere "to cover" (see stegosaurus). Specific sense in biology is from 1660s.
integumentary (adj.) Look up integumentary at Dictionary.com
1826, from integument + -ary.
intellect (n.) Look up intellect at Dictionary.com
"the sum of the cognitive facilities (except sense or sense and imagination), the capacity for reasoning truth," late 14c. (but little used before 16c.), from Old French intellect "intellectual capacity" (13c.), and directly from Latin intellectus "discernment, a perception, understanding," noun use of past participle of intelligere "to understand, discern" (see intelligence). The Latin word was used to translate Greek nous "mind, thought, intellect" in Aristotle.
intellection (n.) Look up intellection at Dictionary.com
c. 1400, intellecioun "meaning, purpose;" mid-15c., "the understanding;" 1610s, "an act of understanding," from Old French intelleccion and directly from Medieval Latin intellectionem (nominative intellectio), noun of action from past participle stem of Latin intelligere "to understand, discern" (see intelligence).
intellectual (adj.) Look up intellectual at Dictionary.com
late 14c., "grasped by the understanding" (rather than by the senses), from Old French intellectuel (13c.) and directly from Latin intellectualis "relating to the understanding," from intellectus "discernment, understanding," noun use of past participle of intelligere "to understand, discern" (see intelligence).

Sense of "characterized by a high degree of intellect" is from 1819. Meaning "appealing to or engaging the mental powers" is from 1834. Intellectual property "products of the intellect" is attested from 1845. Adjective formations in the sense "of or pertaining to the intellect" included intellective (early 15c.), intellectile (1670s).
intellectual (n.) Look up intellectual at Dictionary.com
1590s, "mind, intellect, intellectual powers," from intellectual (adj.). The meaning "an intellectual person" is attested from 1650s but was hardly used in that sense in 19c. and the modern use in this sense seems to be a re-coinage from c. 1906. Related: Intellectuals.
intellectualism (n.) Look up intellectualism at Dictionary.com
1818, in philosophy, "belief in the supremacy of the intellect," probably based on German Intellektualismus (said by Klein to have been coined 1803 by Friedrich Wilhelm Joseph von Schelling (1775-1854) from Late Latin intellectualis); see intellectual + -ism. Meaning "devotion to intellectuality" also is from 1818.
intellectuality (n.) Look up intellectuality at Dictionary.com
mid-15c., "the part of the mind which understands; understanding, intellect;" from Old French intellectualité and directly from Late Latin intellectualitas, from Latin intellectualis "relating to the understanding" (see intellectual).
intellectualization (n.) Look up intellectualization at Dictionary.com
1821, noun of action from intellectualize.
intellectualize (v.) Look up intellectualize at Dictionary.com
1819 (Coleridge), "infuse with intellectual quality," from intellectual + -ize. From 1827 as "exercise the mind, reason upon a matter of intellect." Related: Intellectualized; intellectualizing.
intellectually (adv.) Look up intellectually at Dictionary.com
late 14c., "to or by the understanding," from intellectual + -ly (2).
intelligence (n.) Look up intelligence at Dictionary.com
late 14c., "the highest faculty of the mind, capacity for comprehending general truths;" c. 1400, "faculty of understanding, comprehension," from Old French intelligence (12c.) and directly from Latin intelligentia, intellegentia "understanding, knowledge, power of discerning; art, skill, taste," from intelligentem (nominative intelligens) "discerning, appreciative," present participle of intelligere "to understand, comprehend, come to know," from inter- "between" (see inter-) + legere "choose, pick out, read" (see lecture (n.)).

Meaning "superior understanding, sagacity, quality of being intelligent" is from early 15c. Sense of "information received or imparted, news" first recorded mid-15c., especially "secret information from spies" (1580s). Meaning "a being endowed with understanding or intelligence" is late 14c. Intelligence quotient first recorded 1921 (see I.Q.).
intelligencer (n.) Look up intelligencer at Dictionary.com
1580s, "spy, informant," agent noun from intelligence. Perhaps modeled on French intelligencier or Italian intelligentiere. Meaning "bringer of news, one who conveys intelligence" is from 1630s; as a newspaper name from 1640s.
intelligent (adj.) Look up intelligent at Dictionary.com
c. 1500, a back-formation from intelligence or else from Latin intelligentem (nominative intelligens), present participle of intelligere. Intelligent design, as a name for an alternative to atheistic cosmology and the theory of evolution, is from 1999. Related: Intelligently.
intelligentsia (n.) Look up intelligentsia at Dictionary.com
"the intellectual class collectively," 1905, from Russian intelligyentsiya, from Latin intelligentia "intelligence" (see intelligence). Perhaps via Italian intelligenzia.
intelligibility (n.) Look up intelligibility at Dictionary.com
1670s, from intelligible + -ity.
intelligible (adj.) Look up intelligible at Dictionary.com
late 14c., "able to understand, intelligent," from Latin intelligibilis, intellegibilis "that can understand; that can be understood," from intellegere "to understand, come to know" (see intelligence). In Middle English also "to be grasped by the intellect" (rather than the senses). In English, sense of "capable of being understood, that can be understood" first recorded c. 1600. Related: Intelligibly.
intemperance (n.) Look up intemperance at Dictionary.com
early 15c., "lack of restraint, excess," also of weather, "inclemency, severity," from Old French intemperance (14c.) and directly from Latin intemperantia "intemperateness, immoderation, excess" (as in intemperantia vini "immoderate use of wine"), from in- "not, opposite of" (see in- (1)) + temperantia "moderation, sobriety, discretion, self-control," from temperans, present participle of temperare "to moderate" (see temper (v.)).
intemperate (adj.) Look up intemperate at Dictionary.com
"characterized by excessive indulgence in a passion or appetite," late 14c., from Latin intemperatus "excessive, immoderate," from in- "not, opposite of" (see in- (1)) + temperatus "restrained, regulated, limited, moderate, sober, calm, steady," past participle of temperare "to moderate" (see temper (v.)). Related: Intemperately.
intend (v.) Look up intend at Dictionary.com
c. 1300, entenden, "direct one's attention to, pay attention, give heed," from Old French entendre, intendre "to direct one's attention" (in Modern French principally "to hear"), from Latin intendere "turn one's attention, strain (in quest of something), be zealous," literally "stretch out, extend," from in- "toward" (see in- (2)) + tendere "to stretch" (see tenet).

Sense of "have as a plan, have in mind or purpose" (late 14c.) was present in Latin. A Germanic word for this was ettle, from Old Norse ætla "to think, conjecture, propose," from Proto-Germanic *ahta "consideration, attention" (cognates: Old English eaht, German acht). Related: Intended; intending.
intendant (n.) Look up intendant at Dictionary.com
"one who has charge of some business," 1650s, from French intendant (16c.), from Latin intendantem, present participle of intendere "turn one's attention, exert oneself" (see intend).
intended (n.) Look up intended at Dictionary.com
"one's intended husband or wife," 1767, noun use of past participle of intend (v.).
intense (adj.) Look up intense at Dictionary.com
early 15c., of situations or qualities, "great, extreme," from Old French intense (13c.), from Latin intensus "stretched, strained, high-strung, tight," originally past participle of intendere in its literal sense of "stretch out, strain" (see intend). From 1630s of persons, "high-strung." Related: Intensely; intenseness.
intensification (n.) Look up intensification at Dictionary.com
1835, noun of action from intensify.
intensify (v.) Look up intensify at Dictionary.com
1817 (trans.), from intense + -ify, first attested in Coleridge, in place of intend, which he said no longer was felt as connected with intense. Intransitive sense is from 1853. Middle English used intensen (v.) "to increase (something), strengthen, intensify," early 15c. Related: Intensified; intensifying.
intension (n.) Look up intension at Dictionary.com
c. 1600, "action of stretching; increase of degree or force," from Latin intensionem/intentionem (nominative intensio/intentio) "a stretching, straining," figuratively "exertion, effort," noun of action from past participle stem of intendere in its literal sense of "stretch out, strain" (see intend, and compare intention, which has the figurative sense). Related: Intensional.
intensity (n.) Look up intensity at Dictionary.com
1660s, from intense + -ity. Earlier was intenseness (1610s). A scientific term originally; sense of "extreme depth of feeling" attested by 1830.
intensive (adj.) Look up intensive at Dictionary.com
mid-15c., "intense, fervent, great," from Old French intensif (14c.) and Medieval Latin intensivus, from Latin intens-, past participle stem of intendere "turn one's attention; strain, stretch" (see intend).

Grammatical meaning "expressing intensity" is from c. 1600; as a noun, "something expressing intensity," 1813, from the adjective. Alternative intensitive is a malformation. Intensive care attested from 1958. Related: Intensively; intensiveness.
intent (n.) Look up intent at Dictionary.com
"purpose," early 13c., from Old French entent, entente "goal, end, aim, purpose; attention, application," and directly from Latin intentus "a stretching out," in Late Latin "intention, purpose," noun use of past participle of intendere "stretch out, lean toward, strain," literally "to stretch out" (see intend). In law, "state of mind with respect to intelligent volition" (17c.).
intent (adj.) Look up intent at Dictionary.com
late 14c., "very attentive, eager," from Latin intentus "attentive, eager, waiting, strained," past participle of intendere "to strain, stretch" (see intend). Sense of "having the mind fixed (upon something)" is from c. 1600. Related: Intently.
intention (n.) Look up intention at Dictionary.com
late 14c., entencioun, "purpose, design, aim or object; will, wish, desire, that which is intended," from Old French entencion "intent, purpose, aspiration; will; thought" (12c.), from Latin intentionem (nominative intentio) "a stretching out, straining, exertion, effort; attention," noun of action from intendere "to turn one's attention," literally "to stretch out" (see intend). Also in Middle English "emotion, feelings; heart, mind, mental faculties, understanding."
intentional (adj.) Look up intentional at Dictionary.com
1520s, from intention + -al (1) or else from Medieval Latin intentionalis. Intentional fallacy recorded from 1946. Related: Intentionality.
intentionally (adv.) Look up intentionally at Dictionary.com
"on purpose," 1660s; see intentional + -ly (2). Middle English had the phrase of entencioun (1420) "on purpose, intentionally."
intentioned (adj.) Look up intentioned at Dictionary.com
"having intentions" (of a specified kind), 16c., from intention + -ed.
intentions (n.) Look up intentions at Dictionary.com
"one's purposes with regard to courtship and marriage," by 1796; see intention.
intentive (adj.) Look up intentive at Dictionary.com
late 14c., "eager, assiduous; attentive, paying attention," from Old French ententif, intentif "attentive, solicitous, assiduous" (12c.), from Late Latin intentivus, from intent-, past participle stem of Latin intendere "turn one's attention" (see intend). Related: Intentively; intentiveness.
inter (v.) Look up inter at Dictionary.com
"bury in the earth or a grave," c. 1300, formerly also enter, from Old French enterer (11c.), from Medieval Latin interrare "put in the earth, bury," from in- "in" (see in- (2)) + Latin terra "earth" (see terrain). Related: Interred; interring.
inter alia Look up inter alia at Dictionary.com
Latin, literally "amongst other things." from inter "among, between" (see inter-) + alia, neuter accusative plural of alius "(an)other" (see alias (adv.)). Latin for "among other persons" is inter alios.
inter- Look up inter- at Dictionary.com
word-forming element used freely in English, "between, among, during," from Latin inter (prep., adv.) "among, between, betwixt, in the midst of" (also used extensively as a prefix), from PIE *enter "between, among" (cognates: Sanskrit antar, Old Persian antar "among, between," Greek entera (plural) "intestines," Old Irish eter, Old Welsh ithr "among, between," Gothic undar, Old English under "under"), a comparative of *en "in" (see in (adv.)).

A living prefix in English from 15c. and used with Germanic as well as Latinate words. Spelled entre- in French; most words borrowed into English in that form were re-spelled 16c. to conform with Latin except entertain, enterprise. In Latin, spelling shifted to intel- before -l-, hence intelligence, etc.
inter-war (adj.) Look up inter-war at Dictionary.com
1939, in reference to the period between the world wars, from inter- + war (n.).
interact (v.) Look up interact at Dictionary.com
"act on each other, act reciprocally," 1805, from inter- + act (v.). Related: Interacted; interacting.
interaction (n.) Look up interaction at Dictionary.com
1812, from inter- + action.
interactive (adj.) Look up interactive at Dictionary.com
"acting upon or influencing each other," 1832, from interact (v.), probably on model of active. Related: Interactively; interactivity.
interamnian (adj.) Look up interamnian at Dictionary.com
"between two rivers" (usually, if not exclusively, with reference to Mesopotamia), 1774, from Late Latin interamnius, from inter "between" (see inter-) + amnis "a river," a word perhaps of Celtic origin (see afanc).
interblend (v.) Look up interblend at Dictionary.com
"intermingle," 1823, from inter- + blend (v.). Related: Interblended; interblending.
interbreed (v.) Look up interbreed at Dictionary.com
1859 (trans.) "to breed by crossing species or varieties," from inter- + breed (v.). First attested in Darwin. Intransitive sense of "procreate with one of a different species" is from 1864. Related: Interbred; interbreeding.
intercalary (adj.) Look up intercalary at Dictionary.com
"inserted into the calendar," 1610s, from Latin intercalarius "intercalary, of an intercalary month," from intercalare "proclaim an intercalary day" (see intercalate). General sense of "interpolated" is attested from 1798.