Inability, n.
Etymology: [Pref. in- not + ability: cf. F. inhabileté. See Able, and cf. Unable.]
The quality or state of being unable; lack of ability; want of sufficient power, strength, resources, or capacity. It is not from an inability to discover what they ought to do, that men err in practice. Blair.
Syn. -- Impotence; incapacity; incompetence; weakness; powerlessness; incapability. See Disability.
Shades of meaning
Fernald lists inability only as an antonym, under power.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given