(of a person, behaviour) acting on, resulting from an impulse

tending to act without thought

done without a desire, thought or intention; (of muscle, physical action) moving without conscious control

automatic; not done willingly

(of) a word or verb form showing that the action of a sentence is on the person or thing doing it

automatic; not done willingly

(of an answer, action) not said, done etc as the result of a hint, suggestion etc

tending to act without thought