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Adjective: involuntary  in'vó-lun,te-ree [N. Amer], in'vó-lun-t(u-)ree [Brit]
  1. Not subject to the control of the will
    "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"; "involuntary manslaughter";
    - nonvoluntary, unvoluntary
     
  2. (physiology) controlled by the autonomic nervous system; without conscious control
    "involuntary muscles"; "gave an involuntary start"

See also: automatic, autonomic, driven, forced, goaded, reflex, reflexive, unconscious, unwilled, unwilling, vegetative

Antonym: voluntary

Encyclopedia: Involuntary

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invitingly
invocation
invocatory
invoice
invoke
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involuntarily
involuntariness
involuntary
involuntary muscle
involuntary trust
involute
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involution
involutional depression
involve
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involvement
invulnerability