adj.不知道的；不熟悉的；不认识的；陌生的
The foreigners are unacquainted with our custom. 这些外国人不了解我们的风俗。
She was too young, too impatient to live, too unacquainted with pain. 她还太年轻，太渴望着生活，对痛苦知道得太少。
