say it: im-PER-muhnt
impairment is a noun meaning "the occurrence of a change for the worse". It carries 5 recorded senses.
a symptom of reduced quality or strength
the condition of being unable to perform as a consequence of physical or mental unfitness
“reading disability”
“hearing impairment”
damage that results in a reduction of strength or quality
the act of making something futile and useless (as by routine)
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 impairment 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.