adjective/misteˈɾjoso/
mysterious; mystery (e.g. mystery lover [in an affair], mystery man or woman [in a case or investigation]); eerie (e.g. an eerie place, an eerie air or glow, eerie music); uncanny (e.g. uncanny knowledge or ability)
Etymology tree Spanish misterio Proto-Indo-European *h₃ed- Proto-Indo-European *-os Proto-Indo-European *h₃édosder.? Proto-Italic *-ŏ̄dsos? Old Latin -ōssus Latin -ōsus Old Spanish -oso Spanish -oso Spanish misterioso From misterio + -oso.