咕噜

咕嚕
gūlu
  1. (onom.) to rumble (of a stomach)
  2. to coo (of a dove)
  3. rumbling
  4. noisy drinking sound

CEDICT

onomatopoeic

Entry Composition

1 咕 gū (onom.) for the sound of a bird, an empty stomach etc
2 噜 lū
  1. grumble
  2. chatter