UNDISCIPLINED Synonyms: 117 Similar and Opposite Words

undisciplined

adjective

Definition of undisciplined

as in adamant

behaving in a way that is not properly controlled, organized, serious, etc.; lacking discipline He has been very undisciplined about studying. undisciplined children

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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 undisciplined But also, a problem for our team is undisciplined fouling at times. — Paul Sullivan, Chicago Tribune, 7 Apr. 2026 Miami kept pace early thanks to a similarly efficient start by Adebayo (eight points in the first 98 seconds) and some undisciplined Celtics defense, which gifted the Heat 10 trips to the foul line in the opening eight minutes. — Zack Cox, Boston Herald, 2 Apr. 2026 Meanwhile, on the court, USC was looking undisciplined among the refined style of play that UCLA had settled into. — Haley Sawyer, Oc Register, 8 Mar. 2026 After leading the Kings to a franchise-best 48 wins and 105 points in his first full season as coach, Hiller failed to replicate that success with a team that has appeared unorganized and undisciplined for much of the season. — Los Angeles Times, 1 Mar. 2026 See All Example Sentences for undisciplined

Recent Examples of Synonyms for undisciplined

Adjective

Her mom handmade her dress Parton was adamant about having her mom, Avie Lee Parton, present for her nuptials.

— Nicole Briese, PEOPLE, 27 Aug. 2026
But Coppola was adamant, and Eastman used her leverage to help secure Pacino’s place.

— Tom Tapp, Deadline, 27 Aug. 2026

Definition of adamant

Adjective

Andrew Garfield is not just a rebellious peasant in his upcoming action period drama.

— Lily Ford, HollywoodReporter, 26 Aug. 2026
Green and Perry starred alongside one another on the hit Fox series, in which Green portrayed the aspiring musician David Silver while Perry starred as the rebellious Dylan McKay, for 10 years from 1990 to 2000.

— Colson Thayer, PEOPLE, 25 Aug. 2026

Definition of rebellious

Adjective

Under the Immigration and Nationality Act, citizenship may be revoked if it was illegally procured or obtained through the concealment of a material fact or willful misrepresentation.

— Walter Pavlo, Forbes.com, 12 Aug. 2026
The emotional Moon moves through your 10th House of Career and squares the willful Sun in your 1st House of Identity.

— Tarot.com, The Orlando Sentinel, 5 Aug. 2026

Definition of willful

Adjective

Similarly, June Carter often played the unruly country girl who aimed her punchlines at male hosts and duet partners, including Johnny Cash.

— Stephanie Vander Wel, The Conversation, 28 Aug. 2026
Enormous and exasperatingly unruly, Erotic Vagrancy is intensely personal.

— Literary Hub, Literary Hub, 27 Aug. 2026

Definition of unruly

Adjective

The suspect was uncooperative during the contact and physically resisted, briefly pulling the officer partially inside his vehicle, Lincoln police said in a social media post.

— Tania Azhang, Sacbee.com, 29 Aug. 2026
The Los Angeles Police Department released a video that shows officers at the Valley jail manhandle an uncooperative inmate who died after he was left handcuffed with a bag over his head while laying prone on the bunk in his cell.

— Los Angeles Times, Los Angeles Times, 29 Aug. 2026

Definition of uncooperative

Adjective

Conduct disorder affects children and teens and involves a consistent pattern of disobedient and aggressive behaviors.

— Kristen Rogers, CNN Money, 21 May 2026
Rising gas prices and an unpopular war in Iran have infuriated prominent MAGA figures online, but in terms of GOP elections, the president has been able to elbow out critics in Congress and disobedient legislators in red states.

— Phillip M. Bailey, USA Today, 17 May 2026

Definition of disobedient

Adjective

Captured after years on the run and sentenced to life in 2017, Mladic remained defiant and unrepentant, still revered by some Serbs as a nationalist hero.

— Jovana Gec, Los Angeles Times, 27 Aug. 2026
Bringing it on board with the White House’s latest effort to subdue an Iranian leadership stubbornly defiant after almost six months of war, however, is an extremely tall order.

— Simone McCarthy, CNN Money, 26 Aug. 2026

Definition of defiant

Browse Nearby Words

undirected

undisciplined

undisclosed

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Cite this Entry

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“Undisciplined.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undisciplined. Accessed 3 Sep. 2026.

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Synonyms of undisciplined

adjective

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