一いっ瞬しゅん

noun, adverb

instant; moment

Refers to a very short moment; often used adverbially as 一瞬で or 一瞬のうちに.

• 一いっ瞬しゅん、何なにが起おきたのかわからなかった。

  For an instant, I didn't understand what had happened.

• 彼かれは一いっ瞬しゅんで問もん題だいを解