coo [coos](murmuring sound made by a dove or pigeon) noun [UK: kuː] [US: ˈkuː]
lullaby [lullabies](a soothing song to lull children to sleep) noun [UK: ˈlʌ.lə.baɪ] [US: ˈlʌ.lə.ˌbaɪ]Nemesio loved to fall asleep to the nightly lullaby of the crickets' summer chirping. = A Nemesio le encantaba quedarse dormido al arrullo nocturno del canto veraniego de los grillos.