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 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 The school was underperforming and students were known to be undisciplined. — Christian Stadler, Forbes.com, 8 Apr. 2026 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 See All Example Sentences for undisciplined

Recent Examples of Synonyms for undisciplined

Adjective

So my thought process was to come in and early in the day float her name subtly, and not be too adamant about it.

— Dalton Ross, Entertainment Weekly, 25 Sep. 2026
The Grammy winner was adamant in his Tuesday statement that he wouldn’t be drawn into discussion of the war in Gaza, arguing that his fans don’t come to his shows to hear about these issues.

— Tassanee Vejpongsa, Los Angeles Times, 20 Sep. 2026

Definition of adamant

Adjective

Vivienne Westwood, who died in 2022, helped define the punk fashion movement and became internationally known for rebellious designs that challenged conventional ideas of fashion and style.

— Miami Herald, Miami Herald, 19 Sep. 2026
Emma and Lizzie belong to a wealthy New England family and were once close, but as Lizzie and her rebellious housemaid Bridget Sullivan (Vicky Krieps) become deeply entangled, their relationship strains.

— Yamillah Hurtado, PEOPLE, 19 Sep. 2026

Definition of rebellious

Adjective

But where Hwan’s Christianity is a willful, grotesque misreading of the Bible, Latif actively wrestles with his moral shortcomings.

— Los Angeles Times, Los Angeles Times, 25 Sep. 2026
The title refers not only to the horror film my protagonist, Maya, is trying to make, but also to the city’s new masters and to those living in a zombified state of willful ignorance.

— Literary Hub, Literary Hub, 15 Sep. 2026

Definition of willful

Adjective

The change also covers medical emergencies that are not the airline’s fault, the removal of unruly passengers, certain cyberattacks, and aircraft damage caused by extreme weather or debris.

— Bailey Berg, Condé Nast Traveler, 24 Sep. 2026
Created under O’Hare’s leadership, the decorum policy prohibits personal attacks, impertinent, profane, obscene, or slanderous remarks as well as threatening, disruptive or unruly behavior.

— Rachel Royster, Fort Worth Star-Telegram, 22 Sep. 2026

Definition of unruly

Adjective

The 10-year yield’s rapid climb above 5% shows how quickly investors’ expectations have shifted toward additional tightening from the Federal Reserve in light of stubborn inflation.

— Deena Zaidi, CNBC, 26 Sep. 2026
Simulations show a surface coating cuts the energy needed to strip sulfur from 2D materials, easing a stubborn chip manufacturing problem.

— Tejasri Gururaj, Interesting Engineering, 25 Sep. 2026

Definition of stubborn

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

His music was defiant and bombastic, and critics and fans alike regarded him as a kind of pop messiah.

— Josephine Reisman, Vulture, 24 Sep. 2026
The defiant speech by President Masoud Pezeshkian marked a striking instance of a foreign leader addressing the world body while their country is at war with the host nation.

— Farnoush Amiri, Los Angeles Times, 23 Sep. 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 29 Sep. 2026.

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Synonyms of undisciplined

adjective

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