JMdict: 1276970

口約束 【くちやくそく】

  1. [n,vs,vt,vi] verbal promise; one's word
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
口 Mouth コウ, ク くち 1
約 Promise, Approximately, Shrink ヤク つづ.まる, つづ.める, つづま.やか 4
束 Bundle, Sheaf, Ream, Tie In Bundles, Govern, Manage, Control ソク たば, たば.ねる, つか, つか.ねる 4