buttress (n.)youdaoicibaDictYouDict[buttress 词源字典]
early 14c., from Old French (arc) botrez "flying buttress," apparently from bouter "to thrust against," of Frankish origin (compare Old Norse bauta "to strike, beat"), from Proto-Germanic *butan, from PIE root *bhau- "to strike" (see butt (v.)).[buttress etymology, buttress origin, 英语词源]
buttress (v.)youdaoicibaDictYouDict
late 14c., literal and figurative, from buttress (n.). Related: Buttressed; buttressing.