unidentified

剑桥词典

whose name is not known or is being kept secret
（名字）未知的，不明的，保密的
Police are investigating the death of an unidentified man whose body was found yesterday . 昨天发现的一具无名男尸，警方正在调查该案件。
The airline is currently having merger talks with an unidentified rival . 该航空公司目前正在与一个未透露身份的对手协商并购事宜。
也见 UFO 返回 unidentified