やくそくまも 約束を守る Show inflections LinksSentence search for 約束を守るSentence search for やくそくをまもるKanji details for 約, 束 and 守Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending1. to keep a promise; to keep one's wordSee also 約束を破る Discussions Log in to talk about this word.