bellows (Noun) — A mechanical device that blows a strong current of air; used to make a fire burn more fiercely or to sound a musical instrument.
bellows (Noun) — A very loud utterance (like the sound of an animal). ex. "his bellow filled the hallway"
bellows (Verb) — Shout loudly and without restraint.
bellows (Verb) — Make a loud noise, as of an animal. ex. "The bull bellowed"