成 The 成 sound set All read セイ See 成 as a kanji → These jōyō kanji all use 成 as a sound hint — a clue to pronunciation, not meaning. 盛 セイ、ジョウ boom, prosper, copulate 城 ジョウ、セイ castle 誠 セイ sincerity, admonish, warn ← All sound sets