unfamiliar

柯林斯词典

1. ADJ If something is unfamiliar to you, you know nothing or very little about it, because you have not seen or experienced it before. 不太了解的
She grew many wonderful plants that were unfamiliar to me. 她种了很多我从未见过的奇异植物。
2. ADJ If you are unfamiliar with something, you know nothing or very little about it. 对…不熟悉的[v-link ADJ 'with' n]
She speaks no Japanese and is unfamiliar with Japanese culture. 她不说日语并且不熟悉日本文化。

Many of the technical terms were unfamiliar to me.
She felt increasingly nervous as she walked across a room full of unfamiliar faces .
I'm afraid you'll have to explain things to me, I'm unfamiliar with this system .
He sounded very much like someone I knew , but his face was unfamiliar.
People can often be hostile to anything foreign or unfamiliar.