ケタケタ

adverb, adverb taking the 'to' particle

cackling; laughing shrilly; laughing loudly

Describes a high-pitched, often unpleasant or unrestrained laugh. Often used with 笑う or 笑い声.

• 彼かの女じょはケタケタと笑わらった。

  She laughed shrilly.

• 隣となりの部屋へやからケタケタという笑わらい声ごえが聞きこえてきた。

  I heard a cackling laugh from the next room.