キーキー

with a high-pitched squeak or squeal

→ きーきー

adverb Rare #40,668

with a high-pitched squeak or squeal Describes a sharp, shrill sound, such as an animal's cry or squeaky brakes.

JA: ネズミがキーキー鳴いている。

EN: A mouse is squeaking.

教授キーキーいう音は何です？

Professor, what is that squeaking sound?

— どん底作家の人生に幸あれ! (2019)

私が我慢できないことは、黒板でキーキーとチョークが音を立てることだ。

What I can't stand is the screeching sound of chalk on a blackboard.

ブレーキがキーキーいうバイクなんて欲しがる人いるわけ？

Who would want a bike with squeaky brakes?