Volatile
来自Big Physics
Middle English (in the sense ‘creature that flies’, also, as a collective, ‘birds’): from Old French volatil or Latin volatilis, from volare ‘to fly’.
wiktionary
From Middle French volatile, from Latin volātilis(“flying; swift; temporary; volatile”), from volō(“I fly”).
etymonline
volatile (adj.)
1590s "fine or light," also "evaporating rapidly" (c. 1600), from French volatile, from Latin volatilis "fleeting, transitory; swift, rapid; flying, winged," from past participle stem of volare "to fly" (see volant). Sense of "readily changing, flighty, fickle" is first recorded 1640s. Volatiles in Middle English meant "birds, butterflies, and other winged creatures" (c. 1300).
