どうしんけんご 道心堅固 LinksSentence search for 道心堅固Sentence search for どうしんけんごKanji details for 道, 心, 堅 and 固Edit in JMdict Noun, Na-adjective (keiyodoshi)1. being of firm (unshakable) faith and strict practiceYojijukugo (four character compound) Discussions Log in to talk about this word.