哄こう然ぜん

adverb taking the 'to' particle, taru-adjective

laughing loudly; roaring with laughter

Literary or formal adverb describing a loud, unrestrained laugh. Often used with 笑う or similar verbs.

• 彼かれの冗じょう談だんに、会かい場じょうは哄こう然ぜんと笑わらった。

  At his joke, the audience roared with laughter.

• 哄こう然ぜんたる笑わらい声ごえが部屋へや中じゅうに響ひびいた。

  Loud laughter echoed throughout the room.