The inadequacy of something is the fact that there is not enough of it, or that it is not good enough. the inadequacy of the water supply = deficiency adequacy
The quality or state of being inadequate or insufficient; defectiveness; insufficiency; inadequateness
lack of an adequate quantity or number; "the inadequacy of unemployment benefits"
If someone has feelings of inadequacy, they feel that they do not have the qualities and abilities necessary to do something or to cope with life in general. his deep-seated sense of inadequacy. = accidentally