INABILITY
inability, unfitness
(noun) lacking the power to perform
inability
(noun) lack of ability (especially mental ability) to do something
Source: WordNet® 3.1
Etymology
Noun
inability (countable and uncountable, plural inabilities)
Lack of the ability to do something; incapability.
Lack of the option to do something; powerlessness.
Synonyms
• unability
Source: Wiktionary
In`a*bil"i*ty, n. Etym: [Pref. in- not + ability: cf. F. inhabileté.
See Able, and cf. Unable.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition