Several hundred people were affected by the previously unknown virus.
Most of her friends are unknown to me.
For some unknown reason, the plane landed at the wrong airport.
an unknown poet
The award went to a relative unknown.
our age-old fear of the unknown
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。