He died in mysterious circumstances. See examples of mysterious used in a sentence. Inscrutable applies to that which is.
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The meaning of mysterious is of, relating to, or constituting mystery. Full of, characterized by, or involving 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.
How to use mysterious in a sentence. This is reminiscent of the extraordinary relationship which amputees develop with their artificial replacements, revealing a whole inner mysterious.