IPA: /ˈmɪstɪkəl/
KK: /ˈmɪstɪkəl/
Relating to something that is mysterious or spiritual, often beyond ordinary understanding.
The ancient temple was filled with mystical symbols and carvings.
Mystical → It is formed from "mysticus" (from Greek "mystikos", meaning secret or hidden) and the suffix "-al" (meaning pertaining to). The word "mystical" refers to something that pertains to the secret or hidden aspects of spirituality or the divine.
Think of something that relates to the 'hidden' or 'secret' nature of spirituality — that's what 'mystical' means.