unaccustomed

Từ điển Oxford Advanced Learner 8th

un·accus·tomed [unaccustomed] BrE [ˌʌnəˈkʌstəmd] NAmE [ˌʌnəˈkʌstəmd] adjective (formal)
1. ~ to sth/to doing sth not in the habit of doing sth; not used to sth
•He was unaccustomed to hard work.
•I am unaccustomed to being told what to do.
2. usually before noun not usual, normal or familiar
•The unaccustomed heat made him weary.
•I was surprised by her unaccustomed silence.
Opp: ↑accustomed