Definition of chack in English:

chack

verb

[NO OBJECT]
  • (of a bird) make a harsh call.

    • ‘I love the sound of happy Jackdaws, chacking away.’
    • ‘This unmistakeable member of the crow family was ever present on the Scrubs with at least 10 birds chacking away during the month, though 30 were counted on the 25th.’
    • ‘Birds in the grounds included the usual gang of Greater Antillean Grackles, an exquisite Vervain Hummingbird singing from the very top of a dead tree and seemingly all the White-chinned Thrushes chacking away at some unseen predator, just like all thrushes do throughout the world.’

Origin

Early 16th century: imitative.

Pronunciation:

chack

/tʃak/