unaccustomed
adjective uk/ˌʌn.əˈkʌs.təmd/ us/ˌʌn.əˈkʌs.təmd/
[ after verb ]不习惯的；不适应的
not familiar with something, or not used to something
The weather presented a particular challenge, especially for soldiers unaccustomed to subarctic conditions. 这种天气尤其对不适应亚北极地区气候的军人提出了特别的挑战。
[ before noun ]不寻常的
not usual
The Olympic and world champion finished in the unaccustomed position of fourth. 这位奥运会冠军和世界冠军表现失常，最后仅仅获得了第4名。
Opposite: accustomed