gū​lu

coo

咕噜 (咕嚕) gū​lu
coo onomatopoeia
the soft, murmuring sound made by a dove or pigeon

The pigeons on the roof are cooing.

gulp onomatopoeia
the noisy sound made when drinking or swallowing quickly

He gulped down the entire glass of warm water.

rumble onomatopoeia
the sound of a rumbling stomach or similar low rolling noise

My stomach is growling with hunger.

Frequency

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

Sources

Definitions
CC-CEDICT