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Venn diagram (n.)[Venn diagram 词源字典]: 1918 (Venn's diagram is from 1904), named for English logician John Venn (1834-1923) of Cambridge, who explained them in the book "Symbolic Logic" (1881).[Venn diagram etymology, Venn diagram origin, 英语词源]
venom (n.): mid-13c., venim, venym, "poison secreted by some animals and transferred by biting," from Anglo-French and Old French venim, venin "poison; malice," from Vulgar Latin *venimen (source also of Italian veleno, Spanish veneno), from Latin venenum "poison," earlier (pre-classical) "drug, medical potion," also "charm, seduction," probably originally "love potion," from PIE *wenes-no-, from root *wen- (1) "to strive after, wish, desire" (see Venus). Variously deformed in post-Latin languages, apparently by dissimilation. Modern spelling in English from late 14c. The meaning "bitter, virulent feeling or language" is first recorded c. 1300.
venomous (adj.): c. 1300, from Anglo-French venimeus, Old French venimos (12c., Modern French venimeux), from venim (see venom). Earliest recorded use is figurative; literal sense by early 14c. Related: Venomously; venomousness.
venous (adj.): 1620s, from Latin venosus "full of veins," from vena (see vein).
vent (v.): late 14c., "emit from a confined space," probably a shortening of aventer "expose oneself to the air" (c. 1300), from Old French eventer "let out, expose to air," from Vulgar Latin *exventare, from Latin ex- "out" + ventus "wind" (see wind (n.1)). Sense of "express freely" first recorded 1590s. Sense of "divulge, publish" (1590s) is behind phrase vent one's spleen (see spleen). Related: Vented; venting.
vent (n.): c. 1400, "anus," from Old French vent from verb eventer (see vent (v.)) and in part from Middle English aventer, from the French verb. Perhaps also merged with or influenced by Middle English fent "opening or slit in a the front of a garment (usually held closed with a brooch)," c. 1400, from Old French fente, from Latin findere "to split" (see fissure). Meaning "outlet for water," also "air hole, breathing hole" is from mid-15c. Meaning "action of venting" is recorded from c. 1500.
ventilate (v.): early 15c., "to scatter, disperse (as the wind does)," from Latin ventilatus, past participle of ventilare "to brandish, toss in the air, winnow, fan, agitate, set in motion," from ventulus "a breeze," diminutive of ventus "wind" (see wind (n.1)). Original notion is of cleaning grain by tossing it in the air and letting the wind blow away the chaff. Meaning "supply a room with fresh air" first recorded 1743 (see ventilation). Formerly with diverse slang senses, including "shoot" (someone), recorded from 1875. Related: Ventilated; ventilating.
ventilation (n.): "process of replacing foul air in an enclosed place with fresh, pure air," 1660s, from Latin ventilationem (nominative ventilatio) "an exposing to the air," noun of action from past participle stem of ventilare (see ventilate).
ventilator (n.): 1743, agent noun from ventilate. Latin ventilator meant "a winnower."
ventral (adj.): 1739, from French ventral or directly from Late Latin ventralis "of or pertaining to the belly or stomach," from Latin venter (genitive ventris) "belly, paunch; stomach, appetite; womb, unborn child," from PIE *wend-tri- (cognates: Latin vesica "bladder," Sanskrit vastih "bladder," Old High German wanast, German wanst "paunch, belly"), perhaps from root *udero- "abdomen, womb, stomach" (see uterus).
ventricle (n.): late 14c., "small chamber or cavity within a bodily organ," especially of the heart, from Latin ventriculus (in reference to the heart, ventriculus cordis), literally "little belly," diminutive of venter (genitive ventris) "belly" (see ventral).
ventriloquism (n.): 1773, in the modern sense, from ventriloquy + -ism.
ventriloquist (n.): 1650s in the classical sense, from ventriloquy + -ist. In the modern sense from c. 1800. Ventriloquists in ancient Greece were Pythones, a reference to the Delphic Oracle. Another English word for them was gastromyth.
ventriloquy (n.): 1580s, from Late Latin ventriloquus, from Latin venter (genitive ventris) "belly" (see ventral) + loqui "speak" (see locution). Related: Ventriloquial; ventriloquize.

Patterned on Greek engastrimythos, literally "speaking in the belly," which was not originally an entertainer's trick but rather a rumbling sort of internal speech, regarded as a sign of spiritual inspiration or (more usually) demonic possession. Reference to the modern activity so called seems to have begun early 18c., and by 1797 it was being noted that this was a curiously inappropriate word to describe throwing the voice.
venture (v.): early 15c., "to risk the loss" (of something), shortened form of aventure, itself a form of adventure. General sense of "to dare, to presume" is recorded from 1550s. Related: Ventured; venturing.
Nought venter nought have [Heywood, "Proverbs," 1546]
venture (n.): c. 1400, "fortune, chance," shortening of aventure (n.), a variant of adventure (n.); also from Anglo-French venture. Sense of "risky undertaking" first recorded 1560s; meaning "enterprise of a business nature" is recorded from 1580s. Venture capital is attested from 1943.
venturesome (adj.): 1660s, from venture + -some (1).
Venturi: type of tube, 1887, in reference to Italian physicist G.B. Venturi (1746-1822).
venturous (adj.): "daring, bold, hardy," 1560s, shortened form of adventurous, influenced by venture.
venue (n.): c. 1300, "a coming for the purpose of attack," from Old French venue "coming" (12c.), from fem. past participle of venir "to come," from Latin venire "to come," from PIE root *gwa- "to go, come" (cognates: Old English cuman "to come;" see come). The sense of "place where a case in law is tried" is first recorded 1530s. Extended to locality in general, especially "site of a concert or sporting event" (1857). Change of venue is from Blackstone (1768).