堅けん牢ろう堅けん固ごConjugationsMeaningsNounNa-adjective1. firm and solid; stout and durable (Yojijukugo)Kanji used堅firm牢jail固solidifyComposed of堅けん牢ろうsolid; strong; sturdy; durable; stoutNa-adjective堅けん固ごsolid; strong; firmNa-adjective