An Etymological Dictionary of the German Language/Annotated/Bohle

by Friedrich Kluge

Bohle, feminine, ‘plank, board,’ from the equivalent Middle High German bole; compare Old Icelandic bolr (whence English bole), ‘trunk (of a tree)’; perhaps connected with Middle High German boln, ‘to roll,’ Greek φάλαγξ, ‘trunk.’ See Bollwerk.