noun \ˌin(t)-sə-ˈfish-ən-sē\
plural in·suf·fi·cien·cies


: the quality or state of not being sufficient: as a : lack of adequate supply of something <an insufficiency of vitamins> b : lack of physical power or capacity; especially : inability of an organ or bodily part to function normally <renal insufficiency> <pulmonary insufficiency>—compare aortic regurgitation
in·suf·fi·cient \-ənt\ adjective

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