say it: dee-SUR-tuh-fahy
decertify is a verb meaning "cause to be no longer approved or accepted". It carries one recorded sense.
cause to be no longer approved or accepted
“Carter derecognized Taiwan in 1979 after the U.S. recognized the People's Republic of China”
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 decertify 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.