Related formsmys·te·ri·ous·ly, adverb
mys·te·ri·ous·ness, noun
qua·si-mys·te·ri·ous, adjective
qua·si-mys·te·ri·ous·ly, adverb
un·mys·te·ri·ous, adjective
EXPANDun·mys·te·ri·ous·ly, adverb
un·mys·te·ri·ous·ness, noun
COLLAPSESynonyms
1. secret, esoteric, occult, cryptic. Mysterious, inscrutable, mystical, obscure refer to that which is not easily comprehended or explained. That which is mysterious, by being unknown or puzzling, excites curiosity, amazement, or awe: a mysterious disease. Inscrutable applies to that which is impenetrable, so enigmatic that one cannot interpret its significance: an inscrutable smile. That which is mystical has a secret significance, such as that attaching to certain rites or signs: mystical symbols. That which is obscure is discovered or comprehended dimly or with difficulty: obscure motives. 3. unfathomable, unintelligible, incomprehensible, enigmatic, impenetrable.