inadequacy

n. insufficiency; incompetency, ineptness; inability to perform as required; defect

Inadequacy can refer to the following: Inadequacy is an inability to fulfill a given purpose. For example, an 1/2 inch socket wrench is an inadequate instrument to tighten a 3/8 inch bolt. Most generally though, it refers to having less ability to get the job done.In human nature: Sexual inadequacy is synonymous with sexual impotence. It can have physical or psychological causes. Psychological inadequacy are general feelings of insufficiency. These are often job or family related. Another common example is a Napoleon complex, which is a form of overcompensating.
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Noun
1. lack of an adequate quantity or number; "the inadequacy of unemployment benefits"
(synonym) insufficiency, deficiency
(antonym) sufficiency, adequacy
(hypernym) amount
(hyponym) meagerness, meagreness, poorness, scantiness, scantness, exiguity
2. a lack of competence; "pointed out the insufficiencies in my report"; "juvenile offenses often reflect an inadequacy in the parents"
(synonym) insufficiency
(hypernym) failing, weakness
3. unsatisfactoriness by virtue of being inadequate
(synonym) inadequateness
(antonym) adequacy, adequateness
(hypernym) unsatisfactoriness

(n.)
The quality or state of being inadequate or insufficient; defectiveness; insufficiency; inadequateness.
  

wang4 yang2 xing1 tan4
Lamenting one's inadequacy before a vast ocean.
Describing something that is in sight but beyond reach, or someone who knows that he is not as good as others.