用心に越したことはない ようじんにこしたことはない Also written 用心に越した事は無い Meanings Expression, い-adjective you can never be too careful; you can't be too cautious; better safe than sorry Kanji 用 use. Read as ヨウ. 心 heart. Read as シン. 越 go over. Read as こす. Word lists Proverbs Jinuma: Japanese Dictionary · Word lists