Verb

Middle English venten "to provide with an air hole," in part verbal derivative of vent "anus, outlet, vent entry 2," in part short for aventen "to cool (oneself, as by removing a helmet), release, let air out of," borrowed from Anglo-French aventer "to allow to escape, release, fan," probably altered by vowel reduction from Old French esventer "to fan, cool by stirring the air," going back to Vulgar Latin *exventāre, from Latin ex- ex- entry 1 + -ventāre, verbal derivative of ventus "wind" — more at wind entry 1

Noun (1)

Middle English, "anus, outlet," probably borrowed from Anglo-French, "wind, cold air, draft, outlet" (continental Old French, "wind"), going back to Latin ventus "wind" — more at wind entry 1

Noun (2)

Middle English vent, fente, borrowed from Anglo-French fente "split, crack, opening," derivative of fendre "to split" (going back to Latin findere), probaby by analogy with pairs such as rendre "to yield," rente "income" — more at bite entry 1, render entry 1, rent entry 1

Verb

14th century, in the meaning defined at transitive sense 1

Noun (1)

15th century, in the meaning defined at sense 1

Noun (2)

15th century, in the meaning defined above