unacquainted with
对 ... 不熟悉, 不认识
例句与用法:
An official whose duty is to make introductions between unacquainted persons or to precede persons of rank in a procession.
(给显贵人物)领路的人,前驱职责是为互不认识的人作介绍或在队列中引领重要人物的官员
与……不熟悉; 不认识
I'm unacquainted with him.
我不认识他。