momentaneousyoudaoicibaDictYouDict[momentaneous 词源字典]
"Lasting only a moment; momentary ( Linguistics , with reference to the time taken to perform the action expressed by a verb)", Late Middle English; earliest use found in John Lydgate (c1370–c1449), poet and prior of Hatfield Regis. From post-classical Latin momentaneus momentary (Vetus Latina), instantaneous + -ous.[momentaneous etymology, momentaneous origin, 英语词源]