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Definition of involuntary:

  1. Not having will or the power of choice.
  2. Not proceeding from choice; done unwillingly; reluctant; compulsory; as, involuntary submission.
  3. Not under the influence or control of the will; not voluntary; as, the involuntary movements of the body; involuntary muscle fibers.


automatic, reflex, impulsive, coincidental, planned, impromptu, mechanical, habitual, unbidden, random, unintended, driven, coerced, unwilled, knee-jerk, will-less, willing, nonelective, reflexive, instinctual, goaded, incumbent, mechanic, free, spontaneous, autonomic, instinctive, unvoluntary, unwilling, study at spontaneous, nonvoluntary, by accident, voluntary, robotic, vegetative, forced, peremptory, arbitrary, unpremeditated, unconscious, accidental, uncontrolled, unintentional.

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