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 . 昨天發現的一具無名男屍，警方正在調查該案件。
The airline is currently having merger talks with an unidentified rival . 該航空公司目前正在與一個未透露身份的對手協商竝購事宜。
也見
UFO 返回 unidentified