Synonyms of 'incapacity'
Patients with no mental incapacity can refuse treatment.
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Impotence is a lack of power to influence people or events.
a sense of impotence in the face of disaster
If you refer to someone's inability to do something, you are referring to the fact that they are unable to do it.
Her inability to concentrate could cause an accident.
Thesaurus for incapacity from the Collins English Thesaurus
The incapacity of a person, society , or system to do something is their inability to do it.