involuntary
adjective/ĩvolũˈtaɾju/medium
in·vo·lun·tá·ri·o
Definition
Not done by one's own will; happening without intention.
An involuntary tremor ran through his body.
Her comment was involuntary, and she apologized.
Common collocations
involuntary movementinvoluntary actioninvoluntary gesture
Etymology
Do latim 'involuntarius'.