involuntary

adjectives

not subject to the control of the will
"involuntary manslaughter"; "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"- John F.Kennedy
antonym
controlled by the autonomic nervous system; without conscious control
"involuntary muscles"; "gave an involuntary start"
antonym
is similar to
without volition or conscious control
"the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive"
is similar to
relating to or controlled by the autonomic nervous system
"autonomic reflexes"
is similar to
relating to involuntary bodily functions
"vegetative functions such as digestion or growth or circulation"
domain category
the branch of the biological sciences dealing with the functioning of organisms