adventure (n.) early 13c., auenture “that which happens by chance, fortune, luck,” from O.Fr. aventure (11c.) “chance, accident, occurrence, event, happening,” from L. adventura (res) “(a thing) about to happen,” from adventurus, future participle of advenire “to come to, reach, arrive at,” from ad- “to” (see ad-) + venire “to come” (see venue). Meaning developed through “risk/danger” (a trial of one’s chances) and “perilous undertaking” (early 14c.) and thence to “a novel or exciting incident” (1560s). The -d- was restored 15c.-16c. Venture is a 15c. variant. As a verb, c.1300, “to risk the loss of;” early 14c. “to take a chance.”