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promise; agreement; arrangement; one's word; contract; pact
appointment; engagement; date
convention; rule
destiny; fate
友達との約束を必ず守りました。
I made sure to keep my promise to my friend.
約束の時間に駅で待つ。
Wait at the station at the appointed time.
友達と映画を見る約束をしました。
I made a promise with my friend to watch a movie.