тайнствен означава в английски

arcane▼(understood by only a few; obscure)
adjective
[UK: ɑːˈk.eɪn] [US: ˌɑːrˈk.eɪn]

mysterious▼(having unknown qualities)
adjective
[UK: mɪ.ˈstɪə.rɪəs] [US: ˌmɪ.ˈstɪ.riəs]

mystic▼(mysterious and strange)
adjective
[UK: ˈmɪ.stɪk] [US: ˈmɪ.stɪk]

occult▼(related to the occult)
adjective
[UK: ɒˈkʌlt] [US: əˈkəlt]