damper

nouns

a movable iron plate that regulates the draft in a stove or chimney or furnace
damper
is derived from
damp
is a part of
a vertical flue that provides a path through which smoke from a fire is carried away through the wall or roof of a building
chimney
is a type of (narrower)
a sheet of metal or wood or glass or plastic
plate
a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations
damper, muffler
is derived from
damp
is derived from
damp
a depressing restraint
"rain put a damper on our picnic plans"
damper
is derived from
damp
is a type of (narrower)
the act of controlling by restraining someone or something
"the unlawful restraint of trade"
restraint