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 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

While some households may have tax debts due to willful negligence, others may accrue large unpaid balances for innocent reasons and don’t have the money to repay, experts said.

— Greg Iacurci, CNBC, 16 July 2026
In the case of a willful failure to comply with the law, the company can be liable for actual or statutory damages and punitive damages.

— Lew Sichelman, Miami Herald, 10 July 2026

Definition of willful

Adjective

Backed by water tankers and a helicopter, firefighters on Sunday fought to contain a stubborn wildfire in Northern California that prompted officials to order evacuations.

— Los Angeles Times, Los Angeles Times, 27 July 2026
Individual quality and a moment of magic can often be the key to unlock a stubborn defence, and Vinicius Jr has frequently been the difference for Madrid.

— Mark Carey, New York Times, 27 July 2026

Definition of stubborn

Adjective

The idea that no one’s a star on set is one that Stewart was adamant about, with the attitude continuing since his time on the show.

— Angela Andaloro, PEOPLE, 25 July 2026
This summer has been challenging, yet Newcastle are adamant that their 85 per cent majority owner, Saudi Arabia’s Public Investment Fund (PIF), is determined to spend up to the maximum within the rules moving forward.

— Chris Weatherspoon, New York Times, 18 July 2026

Definition of adamant

Adjective

The inspiration behind this rock-and-roll icon, however, lies in Hindu spiritual symbolism, whose meanings contrast sharply with the rebellious image the logo projects.

— Encyclopedia Britannica, Encyclopedia Britannica, 17 July 2026
Judy Davis stars as Sybylla, a rebellious young woman in 19th century Australia who longs to be a writer, but her traditionalist parents refuse to indulge those dreams, sending her to board with her wealthy grandmother instead.

— ArsTechnica, ArsTechnica, 15 July 2026

Definition of rebellious

Adjective

In one snap, the President, viewed from above, points his finger crossly, as if scolding a scrum of unruly children.

— Katy Waldman, New Yorker, 24 July 2026
At the 2025 Ryder Cup at Bethpage Black, it was widely reported that some unruly fans yelled unacceptable things towards him, but instead of handling , McIlroy snapped, screaming obscenities right back.

— Ian Miller OutKick, FOXNews.com, 19 July 2026

Definition of unruly

Adjective

But rather than being uncooperative, Aguilar would be better off expressing a willingness to review the administration’s evidence.

— Editorial, Boston Herald, 27 July 2026
Both men were uncooperative with police, who are trying to determine where the shooting happened and the motive.

— Harry Harris, Mercury News, 13 July 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

Her music accordingly pares down the signature elements of a genre in which reckless abandon and defiant self-expression have long been central.

— Spencer Kornhaber, The Atlantic, 23 July 2026
The streak did not continue in 2025, but the season turned out to be a more defiant refutation of the caution against rookie tight ends.

— John Riker, New York Times, 20 July 2026

Definition of defiant

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 31 Jul. 2026.

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Synonyms of undisciplined

adjective

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