undisciplined
🇺🇸
/ˌʌnˈdɪsəplɪnd/
🇬🇧
/ˌʌnˈdɪsəplɪnd/
adjective
R
Lacking self-control or order; behaving poorly
The teacher was frustrated with the undisciplined behavior of the students during class.
先生は授業中に生徒たちの無秩序な行動にイライラしました。
translation
無規律な