unversed

adj.不精通的,不熟练的,无知的,无经验的

不熟练；缺乏经验；不熟悉。

形容词

1、I feel unversed in this subject and I don't know what to say.
我对这个主题感到不熟悉，不知道该说什么。
2、He was unversed in the customs and traditions of the country he was visiting.
他对所访问的国家的风俗习惯不熟悉。