Unable vs. Inability

Unableadjective

Not able; lacking a certain ability.

‘Are you unable to mind your own business or something?’;

Inabilitynoun

Lack of the ability to do something; incapability.

Unableverb

To render unable; disable

Inabilitynoun

Lack of the option to do something; powerlessness.

Unableadjective

Not able; not having sufficient strength, means, knowledge, skill, or the like; impotent; weak; helpless; incapable; - now usually followed by an infinitive or an adverbial phrase; as, unable for work; unable to bear fatigue.

‘Sapless age and weak unable limbs.’;

Inabilitynoun

The quality or state of being unable; lack of ability; lack 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.’;

Unableadjective

(usually followed by `to') not having the necessary means or skill or know-how;

‘unable to get to town without a car’; ‘unable to obtain funds’;

Inabilitynoun

lack of ability (especially mental ability) to do something

Unableadjective

(usually followed by `to') lacking necessary physical or mental ability;

‘dyslexics are unable to learn to read adequately’; ‘the sun was unable to melt enough snow’;

Inabilitynoun

lacking the power to perform

Unableadjective

lacking in power or forcefulness;

‘an ineffectual ruler’; ‘like an unable phoenix in hot ashes’;

Inabilitynoun

the state of being unable to do something

‘his inability to accept new ideas’;