say it: DAM-pur
damper is a noun meaning "a movable iron plate that regulates the draft in a stove or chimney or furnace". It carries 3 recorded senses.
a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for damper come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.