Main Entry: bel·low

Pronunciation: \ˈbe-(ˌ)lō\

Function: verb

Etymology: Middle English belwen, from Old English bylgian; akin to Old English & Old High German bellan to roar

Date: before 12th century

intransitive verb 1 : to make the loud deep hollow sound characteristic of a bull
2 : to shout in a deep voicetransitive verb : bawl <bellows the orders>

— bellow noun