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say it: in-suh-FISH-uhn-see
insufficiency is a noun meaning "a lack of competence". It carries 3 recorded senses.
a lack of competence
“pointed out the insufficiencies in my report”
“juvenile offenses often reflect an inadequacy in the parents”
(pathology) inability of a bodily part or organ to function normally
pathology
lack of an adequate quantity or number
“the inadequacy of unemployment benefits”
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 insufficiency 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.