JMdict: 2011520

寝耳に水 【ねみみにみず】

  1. [exp,n] bolt from the blue; great surprise
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
Lie Down, Sleep, Rest, Bed, Remain Unsold シン ね.る, ね.かす, い.ぬ, みたまや, や.める
Ear みみ
Water スイ みず, みず-