- boon (n.)
- late 12c., bone "petition," from Old Norse bon "a petition, prayer," from Proto-Germanic *boniz (source also of Old English ben "prayer, petition," bannan "to summon;" see ban).
- boon (adj.)
- in boon companion (1560s), only real survival of Middle English boon "good" (early 14c.), from Old French bon (see bon).
