bellow
Concise Oxford English Dictionary © 2008 Oxford University Press:
bellow/ˈbeləʊ/
▶verb emit a loud, deep roar, typically in pain or anger.
■ shout or sing very loudly.
▶noun a loud, deep shout or sound.– origin ME: perh. from OE bylgan.
'bellow' also found in these Oxford entries:

