a. not habituated to; unfamiliar with
s. not customary or usual
a. 不习惯的, 不惯的, 异乎惯例的, 不寻常的
1. She felt unaccustomed to the cold weather after living in a warm place for so long.
她在温暖的地方住了很久后，感到不习惯寒冷的天气。
2. He was unaccustomed to waking up early for work every day.
他每天早起上班还不太习惯。
3. The new student appeared unaccustomed to the school rules and regulations.
新学生似乎不太习惯学校的规章制度。