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

automatic; not done willingly

a response to earlier action or activity; opposition to progress or change; (an instance of) a change in one substance caused by another

response

a reflex action; involuntarily; without will or conscious control

mechanical

(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