noun which may take the genitive case particle 'no'
Used as a no-adjective to describe something not yet verified or identified. Common in compounds like 未確認情報 (unconfirmed information) and 未確認飛行物体 (unidentified flying object).
その情報はまだ未確認です。
That information is still unconfirmed.
未確認の生物
An unidentified creature was sighted.