けんろうけんご 堅牢堅固 LinksSentence search for 堅牢堅固Sentence search for けんろうけんごKanji details for 堅, 牢 and 固Edit in JMdict Noun, Na-adjective (keiyodoshi)1. firm and solid; stout and durableYojijukugo (four character compound) Discussions Log in to talk about this word.