Japanese Word of the Day
約束
/ya-KU-so-ku/ • noun (can be used as a verb with 約束する) — 18th of Apr, 2026
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Meaning: a promise; an arrangement or appointment between people
Examples
- 彼と会う約束をしました。
(I made an appointment / promised to meet him.) - 約束を守ってください。
(Please keep your promise.) - 明日の約束を忘れないでね。
(Don't forget our appointment/promise for tomorrow.)
Synonyms
- 誓い
- 取り決め
約束 is used for personal promises (約束をする) and for arranged meetings or appointments. Common phrases: 約束を守る (to keep a promise) and 約束を破る (to break a promise). It can be casual (約束だよ) or formal (約束いたします / 約束します) depending on context. When referring to bookings (like reservations), use 予約 instead.
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