成語 せいご Meanings Noun set phrase; idiomatic expression Kanji 成 become. Read as セイ. 語 language. Read as ゴ. Words containing 成語 合成語 (ごうせいご) compound word 故事成語 (こじせいご) idiom derived from historical events or classical literature of China 混成語 (こんせいご) hybrid language And 2 more. Jinuma: Japanese Dictionary · Word lists