unwonted
🇺🇸
/ʌnˈwəʊntɪd/
🇬🇧
/ʌnˈwəʊntɪd/
not common or typical
The teacher was surprised by the student's unwonted silence during class.
老师对学生在课堂上不同寻常的沉默感到惊讶。