IN-VOLUNTARY Synonyms: 134 Similar and Opposite Words

involuntary

adjective

(ˌ)in-ˈvä-lən-ˌter-ē

Definition of involuntary

as in accidental

not made or done willingly or by choice my long stays on the sidelines during our football games were strictly involuntary

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in automatic

done instantly and without conscious thought or decision breathing is involuntary

Synonyms & Similar Words

Antonyms & Near Antonyms

as in compulsory

forcing one's compliance or participation by or as if by law the abolition of involuntary servitude by civilized society

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of involuntary Hospital staff reportedly told them Vincent was exhibiting agonal breathing, an involuntary reflex that can occur near death. — Brittany Miller, FOXNews.com, 5 July 2026 With more advanced cameras and larger data sets, involuntary behavior such as heart rate and skin flushness could also be tracked. — Jacob Feldman, Sportico.com, 3 July 2026 That original documentation was directly linked to the president's executive order, calling for involuntary commitment of people experiencing homelessness. — Quil Lawrence, NPR, 25 June 2026 Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction. — Ann Manov, Harpers Magazine, 23 June 2026 See All Example Sentences for involuntary

Recent Examples of Synonyms for involuntary

Adjective

Fire officials deemed the fire accidental after determining that the family dog, Bo, jumped onto the kitchen counter and turned on the toaster, which ignited nearby combustibles.

— Adam Thompson, CBS News, 14 July 2026
Its lightweight, compliant structure makes accidental contact with people, pets and furniture far safer than conventional drones.

— Jijo Malayil, Interesting Engineering, 13 July 2026

Definition of accidental

Adjective

Setting up recurring automatic contributions is a good way to slowly build your investment fund.

— Elizabeth Gravier,Dan Avery, CNBC, 16 July 2026
The legislative provision must include gradual and continual reductions in federal debt held by the public as a percent of GDP between the date of enactment and Fiscal 2040 with automatic enforcement mechanisms.

— Steve H. Hanke, Fortune, 15 July 2026

Definition of automatic

Adjective

Both laws represent significant concessions by Netanyahu’s Likud party to ultra-Orthodox politicians seeking to formalize their community’s de facto exemption from serving in the military, which is compulsory for most Jewish men and women in Israel.

— Melanie Lidman, Los Angeles Times, 14 July 2026
As economist and Opportunity@Work founder Byron Auguste has noted, when policymakers, employers and parents all realized that the shifting job landscape required a different preparatory path, states passed compulsory education laws.

— Tim Knowles, Fortune, 8 July 2026

Definition of compulsory

Adjective

That didn’t seem to dent the energy, with spontaneous Argentinian futbol songs breaking out among scrums of fans.

— Matias Ocner, Miami Herald, 3 July 2026
Instead of limiting where an electric bike can go, its folding design creates more opportunities to ride, making spontaneous adventures easier than ever while still providing the comfort needed for longer distances.

— New Atlas, New Atlas, 2 July 2026

Definition of spontaneous

Adjective

Its internal mechanical architecture is modeled on the human spine and musculoskeletal system, using synthetic muscle-like actuators that enable fluid, natural movements.

— Jijo Malayil, Interesting Engineering, 16 July 2026
Although cops initially found no evidence of a mechanical malfunction, the family has alleged that Butler’s car may have been defective.

— Ashley Belanger, ArsTechnica, 16 July 2026

Definition of mechanical

Adjective

An evacuation warning means a potential threat to life and/or property, and those who require time to evacuate were urged to leave ahead of any mandatory evacuation order.

— Carlos E. Castañeda, CBS News, 14 July 2026
Regulation varies by state and there is currently no mandatory federal accreditation or licensing requirement for either body donation organizations or non-transplant tissue banks, which are not regulated by the US Food and Drug Administration.

— Leah Dolan, CNN Money, 13 July 2026

Definition of mandatory

Adjective

But controversies are plaguing the league, Clark has become an unwilling symbol of racial polarization and GOP members of Congress are entering the fray.

— Joel Mathis, TheWeek, 17 July 2026
LeVota has said that the county is unwilling to settle out of court.

— Ilana Arougheti, Kansas City Star, 17 July 2026

Definition of unwilling

Adjective

As the session continues, Atlas’s movements appear increasingly fluid, suggesting the system is being evaluated not only for strength but also for agility, reflex response, and adaptive motor control.

— Jijo Malayil, Interesting Engineering, 24 June 2026
Wyle listened to the two women’s breathing and administered a reflex test on their knees.

— Ethan Shanfeld, Variety, 8 May 2026

Definition of reflex

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involuntarily

involuntary

involute

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Style

“Involuntary.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/involuntary. Accessed 20 Jul. 2026.

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Synonyms of involuntary

adjective

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