正しょう体たい不ふ明めい

noun, noun which may take the genitive case particle 'no'

unidentified; unidentifiable; of unknown identity

Used for people, objects, or phenomena whose true nature or identity cannot be determined. Often appears in news, mystery, or speculative contexts.

• 警けい察さつは正しょう体たい不ふ明めいの遺い体たいを発はっ見けんした。

  The police found an unidentified body.

• 夜よ空ぞらに正しょう体たい不ふ明めいの光ひかる物ぶっ体たいが現あらわれた。

  An unidentified glowing object appeared in the night sky.