undisciplined

adjective

Definition of undisciplinednext
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
  1. willful
  2. stubborn
  3. adamant
  4. rebellious
  5. unruly
  6. uncooperative
  7. disobedient
  8. defiant
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
  • Have a stubborn stain or lingering odor somewhere in your home?
    — Caroline Lubinsky, Martha Stewart, 3 Aug. 2026
  • Pair them with the Corn Boats so your cob doesn't roll away; the incredibly handy Corn Stripper, which removes kernels from the cob in one smooth, easy motion; and the Corn Brush, which removes stubborn corn silk easily.
    — ABC News, ABC News, 3 Aug. 2026
Definition of stubborn
Adjective
  • But Powell was adamant about his right to set such parameters.
    — KORI SCHAKE, Foreign Affairs, 6 Aug. 2026
  • The family is also adamant that they were told by the hospital that by the time Lopez-Cornejo arrived there on Saturday, his heart was no longer beating.
    — Armando Garcia, ABC News, 4 Aug. 2026
Definition of adamant
Adjective
  • This shift has moved in tandem with the growing dynamic of parliamentarians becoming more rebellious and less loyal to their leadership.
    — Garret Martin, The Conversation, 31 July 2026
  • John Mellencamp's rebellious spirit drives him Along with his status as blue-collar rocker, Mellencamp is also a respected artist.
    — Melissa Ruggieri, USA Today, 30 July 2026
Definition of rebellious
Adjective
  • His long, often unruly lines, while not always ear-pleasing to me, are attractive in their chaotic nature.
    — Literary Hub, Literary Hub, 6 Aug. 2026
  • Where season three frustrated with its aimless pacing, its unruly plotting, its self-congratulatory strain of goodness, new showrunner Jack Burditt (30 Rock, Modern Family) dials back the worst of the show’s excesses.
    — Angie Han, HollywoodReporter, 5 Aug. 2026
Definition of unruly
Adjective
  • According to the sheriff, Joyce’s roommate has been uncooperative during the investigation.
    — Yana Johnson, NBC news, 29 July 2026
  • Now, Schroeder says FAST responds right away and ensures cases don't fall through the cracks, even when witnesses are uncooperative.
    — Ashley Grams, CBS News, 29 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
  • Bea will play Julia Hanley, a defiant and magnetic Irish photographer who sees past Tom’s world-changing ambition to the man beneath it, redefining his life through love.
    — Lexi Carson, HollywoodReporter, 6 Aug. 2026
  • Aegon will have none of it and begins his rousing, defiant speech.
    — Erik Kain, Forbes.com, 3 Aug. 2026
Definition of defiant

Browse Nearby Words

undirected
undisciplined
undisclosed
See all Nearby Words

Cite this Entry

“Undisciplined.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undisciplined. Accessed 10 Aug. 2026.

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