involuntary

1 not made or done willingly or by choice my long stays on the sidelines during our football games were strictly involuntary Synonyms coerced, forced, unintended, unintentional, unwilling, will-less Related Words accidental, unplanned, unpremeditated; automatic, impulsive, instinctive, spontaneous, unprompted; inadvertent, unconscious, unknowing, unwitting Near Antonyms advised, conscious, considered, knowing, planned, premeditated, premeditative, prepense, purposeful; volitional; self-imposed, self-inflicted Antonyms deliberate, freewill, intentional, uncoerced, unforced, voluntary, willful (or wilful), willing

2 done instantly and without conscious thought or decision breathing is involuntary Synonyms instinctive, instinctual, automatic, knee-jerk, mechanic, mechanical, robotic, spontaneousRelated Words conditioned, natural, Pavlovian, reactive, reflex, simple, subliminal, unconscious, unforced, visceral; blind, inadvertent, unintended, unintentional, unwilling, unwitting; abrupt, quick, ready, sudden; ad-lib, extemporaneous, extempore, impromptu, improvised, offhand, offhanded, off-the-cuff, snap, spur-of-the-moment, unconsidered, unplanned, unpremeditated, unprepared, unprompted, unreasoned, unrehearsed, unstudied; casual, chance, chancy, haphazard, hasty, hit-or-miss, impetuous, impulsive, mindless, random, rashNear Antonyms calculated, conscious, cultivated, deliberate, designed, intended, intentional, predetermined, prepared, projected, refined, rehearsed, volitional, voluntary, willed, willful (or wilful); advised, aforethought, careful, considered, foresighted, forethoughtful, measured, meticulous, reasoned, studied, thoughtfulAntonyms nonmechanical

3 forcing one's compliance or participation by or as if by law the abolition of involuntary servitude by civilized society Synonyms compulsory, forced, imperative, incumbent, mandatory, necessary, nonelective, obligatory, peremptory, requiredRelated Words all-important, essential, indispensable, needed, requisite; insistent, persistent, pressing, urgent; demanded, enforced; coerciveNear Antonyms chosen, discretionary; dispensable, unnecessary, unneeded, unwanted; inconsequential, insignificant, nonessential, unimportantAntonyms elective, optional, voluntary