功こう用ようこうようじ字FuriganaMeanings1nounuse; function; roleobsolete termObsolete term for the practical use, function, or role of something. Replaced in modern Japanese by words like 使い道, 機能, or 役割.古ふるい文ぶん献けんでは「功こう用よう」が道どう具ぐの役やく割わりを指さす