志操堅固 しそうけんご Meanings Noun, な-adjective being faithful to one's principles; being of firm purpose and deep commitment; constancy; true blue Kanji 志 aspire. Read as シ. 操 operate. Read as ソウ. 堅 firm. Read as ケン. 固 solid. Read as コ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists