undisciplined

adjective

un·​dis·​ci·​plined ˌən-ˈdi-sə-plənd 

: lacking in discipline or self-control

undisciplined behavior

an unruly and undisciplined child

Examples of undisciplined in a Sentence

Recent Examples on the Web

But also, a problem for our team is undisciplined fouling at times. — Paul Sullivan, Chicago Tribune, 7 Apr. 2026

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

McCain called her ex-colleagues 's‑‑‑‑y and undisciplined' during the on-air discussion. — Joey Nolfi, Entertainment Weekly, 17 June 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

Word History

First Known Use

14th century, in the meaning defined above

Rhymes for undisciplined

• disciplined