ekekek

A chattering or trilling sound made by domestic cats, often when watching prey.

Japanese Meaning

家猫が獲物を見ているときに発する、早口で細かい鳴き声やトリル音

The old tabby made an ekekek as it crouched by the window, eyes fixed on the sparrow below.

その年老いた縞猫は窓辺に身を低くして、下のスズメを見つめながらチャッタリングの音を立てた。

Sense（1）

A chattering or trilling sound made by domestic cats, often when watching prey.