involuntary

Involuntary describes a reflex or action done without conscious control or will — like a blink, a sneeze, a yawn, or “the giggles.”

If you volunteered to do it, it’s voluntary. If you didn’t volunteer, but you find yourself doing it anyway, it’s involuntary. This can go for the involuntary hiccups you wrestle with on your blind date, as well as the involuntary task you do at your manager’s insistence. Involuntary gets a lot of blame, but something that is involuntary is not necessarily bad: Breathing is involuntary, but you would probably do it anyway if given the choice.

Definitions of involuntary
1

adj 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”
Synonyms:
nonvoluntary, unvoluntary
unconscious
not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
driven, goaded
compelled forcibly by an outside agency
forced
forced or compelled
unconscious
without conscious volition
unwilled
without deliberate volition
unwilling
in spite of contrary volition
unwilling
not disposed or inclined toward
Antonyms:
voluntary
of your own free will or design; done by choice; not forced or compelled
conscious
knowing and perceiving; having awareness of surroundings and sensations and thoughts
intended
resulting from one's intentions
wilful, willful
done by design
freewill
done of your own accord
self-imposed
voluntarily assumed or endured
uncoerced, unforced, willing
not brought about by coercion or force
unpaid, volunteer
without payment
willing
disposed or inclined toward
show more antonyms...

adj controlled by the autonomic nervous system; without conscious control

involuntary muscles”
“gave an involuntary start”
Synonyms:
automatic, reflex, reflexive
without volition or conscious control
autonomic
relating to or controlled by the autonomic nervous system
vegetative
relating to involuntary bodily functions
Antonyms:
voluntary
controlled by individual volition

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