proem (n.)youdaoicibaDictYouDict[proem 词源字典]
late 14c., proheme "brief introduction, prelude," from Old French proheme (14c., Modern French proème), from Latin prooemium, from Greek prooimion "prelude" to anything, especially music and poetry, from pro- "before" (see pro-) + oimos "way" or oime "song."[proem etymology, proem origin, 英语词源]
throe (n.)youdaoicibaDictYouDict
c. 1200, throwe "pain, pang of childbirth, agony of death," of uncertain origin, possibly from Old English þrawan "twist, turn, writhe" (see throw (v.)), or altered from Old English þrea (genitive þrawe) "affliction, pang, evil; threat, persecution" (related to þrowian "to suffer"), from Proto-Germanic *thrawo (cognates: Middle High German dro "threat," German drohen "to threaten"). Modern spelling first recorded 1610s. Related: Throes.