bûche f (plural bûches)
From Proto-Germanic *bōkijǭ (compare Dutch beuk, German Buche, Danish bøg), from Proto-Germanic *bōks (“beech; book”), from Proto-Indo-European *bʰeh₂ǵos (“beech tree”), same source as Latin fāgus (“beech”), Russian бузина (buziná, “elder”), Ancient Greek φηγός (phēgós, “oak”).