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damper

noun
     
Related topics: Music, Technology
damp‧er [countable]
1

put a damper on something

to make something less enjoyable, active, or great than it could have been:
A couple of knee injuries put a damper on his football career.
2T a type of small metal door that is opened or closed in a stove or furnace, to control the air reaching the fire so that it burns more or less strongly
3 a piece of equipment that stops a movement from being too strong
4APM a piece of equipment that stops a piano string from making a sound

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