inadequacy

noun

1. lack of an adequate quantity or number

   noun.attribute

   Examples

   The inadequacy of unemployment benefits.

   Synonyms deficiency insufficiency

   Antonyms adequacy sufficiency

   Source: WordNet 3.0

2. a lack of competence

   noun.state

   Examples

   Juvenile offenses often reflect an inadequacy in the parents.

   Synonyms insufficiency

   Source: WordNet 3.0

3. unsatisfactoriness by virtue of being inadequate

   noun.attribute

   Synonyms inadequateness

   Antonyms adequacy adequateness

   Source: WordNet 3.0

4. The quality or state of being inadequate or insufficient; defectiveness; insufficiency; inadequateness.

   noun

   Source: webster1913