英语词源字典 - 在线词源网站

bow (v.)[bow 词源字典]: Old English bugan "to bend, to bow down, to bend the body in condescension," also "to turn back" (class II strong verb; past tense beag, past participle bogen), from Proto-Germanic *bugon (cognates: Dutch buigen, Middle Low German bugen, Old High German biogan, German biegen, Gothic biugan "to bend," Old Norse boginn "bent"), from *beugen, from PIE root *bheug- (3) "to bend," with derivatives referring to bent, pliable, or curved objects (cognates: Sanskrit bhujati "bends, thrusts aside;" Old High German boug, Old English beag "a ring"). The noun in this sense is first recorded 1650s. Related: Bowed; bowing. Bow out "withdraw" is from 1942. [bow etymology, bow origin, 英语词源]
elbow (v.): "thrust with the elbow," c. 1600, from elbow (n.). Figurative sense is from 1863. Related: Elbowed; elbowing.
namaste (n.): "salutatory gesture," 1948, from Hindi, from Sanskrit namas "bowing" + te, dative of tuam "you" (singular). Used as a word of greeting from 1967.