To coo like a pigeon or dove.
कू-कू करना
English Usage: "The birds were kooing softly in the morning."
Hindi Usage: "पक्षी सुबह में हल्की कू-कू कर रहे थे।"
koo-koo karna, koo koo karna, kukoo karna, kookoo karna, ku-ku karna
