say it: BLAK-mayl
blackmail is a verb and noun meaning "exert pressure on someone through threats". It carries 3 recorded senses.
extortion of money by threats to divulge discrediting information
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 blackmail 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.