Undisciplined

/ʌnˈdɪsəplɪnd/

Meaning & Definition

adjective
lacking discipline; not controlled or regulated; unruly.
The undisciplined behavior of the students led to chaos in the classroom.
not following a proper system or regimen.
His undisciplined lifestyle resulted in many health issues.
acting without restraint or adherence to rules.
The team's undisciplined play allowed the opponents to score easily.

Etymology

From the prefix 'un-' meaning 'not' and 'disciplined', the past participle of 'discipline'.

Common Phrases and Expressions

undisciplined behavior:
Actions that show a lack of discipline or self-control.
undisciplined mind:
A mind that wanders and lacks focus or order.

Related Words

Slang Meanings

loose cannon
He's such a loose cannon, never follows rules or guidelines.
wild child
After running away from home, she was seen as a wild child with undisciplined habits.