incapacity

Inadequate strength or ability; lack of capacity.

A defect or handicap; a disability.

Disqualification from taking part in a legal proceeding because of mental or physical disability or because of lack of legal power or authority.

Lack of capacity; lack of ability or qualification; inability; incapability; incompetency.

In law, the lack of legal qualification; that condition of a person which forbids a given act on his part, and makes the act legally inefficacious even if he does it.