Middle High German buoch, from Old High German buohha, from Proto-Germanic *bōkijǭ. Cognate with German Buche, Dutch beuk, English beech.
Buech f (plural Bueche, diminutive Buechli or Büechli)
Middle High German buoch, from Old High German buoh, from Proto-Germanic *bōks. Cognate with German Buch, Dutch boek, English boook, Icelandic bók.
Buech n (plural Büecher, diminutive Büechli)