damper
n.n. a small, round object that you put in a fireplace to control the flow of air and heat. It helps you keep the fire going without making the room too hot.
n. a device used to regulate the flow of air into a fireplace or stove, typically consisting of a metal plate with a hole in the center. It functions as a heat regulator by controlling the amount of oxygen available to the fire.
He adjusted the damper to keep the fire burning.
The cold draft in the living room was caused by a broken damper that allowed too much air to escape through the chimney.
By partially closing the damper, the homeowner managed to maintain a steady, low-burning fire that provided warmth without consuming the entire supply of firewood in a single evening.
From damp (verb) + -er. The name of the type of bread is first attested in 1825, and originally likely refers to damping the appetite.
From damp (adjective) + -er.