Unknown
Unidentified
noun, な adjective, の adjective
ふしょう
不明 （ふめい） Unknown, Unclear, Uncertain, Unsure
不詳 （ふしょう） Unknown, Unidentified
The fool ふ showed しょう me an Unknown flying object (UFO) that turned out to be a frisbee.
His whereabouts have been Unknown ever since he tried to fool ふ the shogun しょう