くわっと

adverb

suddenly and widely (opening eyes)

Mimetic adverb describing eyes opening wide in surprise, anger, or sudden realization. Often used with verbs like 開く or 見開く.

• 驚おどろいて、彼かれは目めをくわっと開ひらいた。

  Startled, he opened his eyes wide suddenly.

• 怒おこった猫ねこがくわっと目めを見み開ひらいた。

  The angry cat opened its eyes wide.