inadequacy
nounThe quality or condition of being inadequate.
nounAn instance of being inadequate; a failing or lack.
nounThe state or quality of being inadequate, insufficient, or disproportionate; incompleteness; defectiveness.
nounThe quality or state of being inadequate or insufficient; defectiveness; insufficiency; inadequateness.
nounthe state of being
a
a lack of
lack of an adequate quantity or number
nouna lack of competence
noununsatisfactoriness by virtue of being inadequate