gū​lu

[sound of rumbling or gurgling]

咕噜 咕嚕 gū​lu
[sound of rumbling or gurgling] adverb
Describes sounds such as a stomach rumbling, water flowing, objects rolling, or a bird cooing
to mutter
To mumble or talk to oneself in a low, unclear voice; to grumble or complain

Frequency

Movie subtitles
2.15 per million appears in 1% of films
Written text
1.10 per million

Sources