boon (n.)youdaoicibaDictYouDict[boon 词源字典]
late 12c., bone "petition," from Old Norse bon "a petition, prayer," from Proto-Germanic *boniz (cognates: Old English ben "prayer, petition," bannan "to summon;" see ban).[boon etymology, boon origin, 英语词源]
boon (adj.)youdaoicibaDictYouDict
in boon companion (1560s), only real survival of Middle English boon "good" (early 14c.), from Old French bon (see bon).