IPA: //ˈkɒk.kroʊ//
KK: /kɑkˌkroʊ/
The time of day when the sun begins to rise, often associated with the sound of roosters crowing.
The farmers wake up at cockcrow to start their day early.
Cockcrow is formed from "cock" (from Old English "cocc", meaning rooster) and "crow" (from Old English "crāwe", meaning to cry out or make a sound). The term refers to the sound made by a rooster, especially at dawn.
Think of a rooster ('cock') making its morning call ('crow') — that's why 'cockcrow' refers to the time when roosters announce the dawn.
No commonly confused words.