a.[Z]

1. 不習慣的；不熟悉的[F][（+to）]
   He was unaccustomed to the weather there.

   他不習慣那裡的氣候。

2. 不尋常的，奇怪的[B]
   his unaccustomed expression of anger

   他的不尋常的憤怒表情

adj.

1. not customary; unusual.
2. (unaccustomed to) not familiar with or used to.