insufficiency

(noun) a lack of competence. Synonyms: inadequacy. Examples: "Pointed out the insufficiencies in my report." "Juvenile offenses often reflect an inadequacy in the parents."

(noun) (pathology) inability of a bodily part or organ to function normally.

(noun) lack of an adequate quantity or number. Synonyms: inadequacy, deficiency. Example: "The inadequacy of unemployment benefits."