vent: English has two words vent. The verb, ‘provide with an outlet’ [14], came via Old French esventer from Vulgar Latin *exventāre ‘let out air’. This was a compound verb formed from the Latin prefix ex- ‘out’ and ventum ‘wind’ (source also of English ventilate [15] and distantly related to English wind). Vent ‘slit in the back of a garment’ [15] goes back via Old French fente to Vulgar Latin *findita ‘slit’, a noun use of the feminine past participle of Latin findere ‘split’ (source also of English fission [19] and fissure [14]). => ventilate, wind; fission, fissure[vent etymology, vent origin, 英语词源]