UNDISCIPLINED Synonyms: 117 Similar and Opposite Words

undisciplined

adjective

Definition of undisciplined

as in willful

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 The outfielder’s at-bats were largely undisciplined, and judging by the entirety of his turbulent 2025 season, Veen clearly lacked the off-field maturity to be ready for his call-up. — Kyle Newman, Denver Post, 30 Apr. 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 Just disbelief and incredulity that England should find themselves again facing accusations of a drinking culture and a far too loose and undisciplined team environment after their first Test since the shambles of the Ashes. — Paul Newman, New York Times, 11 June 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 See All Example Sentences for undisciplined

Recent Examples of Synonyms for undisciplined

Adjective

In 2018, the IRS closed the Offshore Voluntary Disclosure Program (OVDP), ending the formal disclosure program designed primarily for taxpayers with potential criminal exposure or willful violations relating to unreported offshore holdings.

— Virginia La Torre Jeker, Forbes.com, 2 July 2026
Federal law generally prohibits direct service connection for addiction classified as resulting from willful misconduct.

— Daniel Fusch, USA Today, 29 June 2026

Definition of willful

Adjective

Colombia earned its passage into the round of 16 with a 1-0 win over stubborn Ghana.

— Kevin Baxter, Los Angeles Times, 6 July 2026
Pickle Robot’s Physical AI unloaders tackle the dock door bottleneck, which is a stubborn pain point in inbound logistics, while AmbiStack handles the structured, high-volume stacking that feeds downstream operations.

— Arthur Zaczkiewicz, Footwear News, 6 July 2026

Definition of stubborn

Adjective

While waiting to go to court, Zaayer remained adamant that Shawna needed to go to prison but was also convinced that David — who worked at the nearby jail — was protecting his wife from receiving an adequate punishment, per The Guardian.

— Caroline Blair, PEOPLE, 3 July 2026
But Senate Majority Leader John Thune (R-SD) has been adamant that there are not enough votes in the Senate to pass the legislation, given the 60-vote filibuster threshold.

— Mabinty Quarshie, The Washington Examiner, 28 June 2026

Definition of adamant

Adjective

For seven seasons, a hodgepodge crew mixing Starfleet and the rebellious Maquis put aside their differences after they got zapped 70,000 lightyears away from Earth, deep into the uncharted Delta Quadrant.

— Jordan Hoffman, Entertainment Weekly, 4 July 2026
This could bring about sudden ideas, or trigger rebellious impulses and creative imagination.

— Valerie Mesa, PEOPLE, 26 June 2026

Definition of rebellious

Adjective

Several North Lake Tahoe beaches will be closed Saturday evening during the July 4 holiday due to what law enforcement officials described as unruly crowds of visiting teenagers.

— Corey Schmidt, Sacbee.com, 4 July 2026
Britain, arguably, decided to cut its losses with the unruly thirteen colonies to better safeguard its more lucrative possessions in the Caribbean and South Asia.

— Ishaan Tharoor, New Yorker, 2 July 2026

Definition of unruly

Adjective

Authorities said the two men were uncooperative with officers at the hospital.

— Harry Harris, Mercury News, 23 June 2026
The uncooperative witness testimony was a blow to the defense, who also called two of their own expert witnesses to cast doubt on the federal investigation and testify that fireworks were the most likely cause of the fire.

— ABC News, ABC News, 22 June 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

Browse Nearby Words

undirected

undisciplined

undisclosed

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“Undisciplined.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undisciplined. Accessed 9 Jul. 2026.

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Synonyms of undisciplined

adjective

Example Sentences

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