Inscrutable applies to that which is. This is reminiscent of the extraordinary relationship which amputees develop with their artificial replacements, revealing a whole inner mysterious. He died in mysterious circumstances.
Liverpool Mac Allister brothers go headtohead in Europe BBC Sport
The meaning of mysterious is of, relating to, or constituting mystery. That which is mysterious, by being unknown or puzzling, excites curiosity or awe: Someone or something that is mysterious is strange and is not known about or understood.
Full of, characterized by, or involving mystery.
See examples of mysterious used in a sentence. How to use mysterious in a sentence.