キーキー

adverb, adverb taking the 'to' particle

with a squeak; with a creak; with a screech

Mimetic adverb describing a high-pitched, sharp, often unpleasant sound like a squeak, creak, or screech. Often used with と.

• ドアがキーキーと音おとを立たてて開ひらいた。

  The door opened with a creak.

• ネズミがキーキー鳴ないている。

  The mouse is squeaking.