IPA: /θjuˈɜːrdʒɪkəl/
KK: /θjuˈɜrʧəl/
Relating to magic or the practice of invoking supernatural powers.
The theurgical rituals were believed to connect practitioners with divine forces.
The word 'theurgical' is formed from 'theur-' (from Greek 'theourgia', meaning divine work or magic) and '-ical' (meaning pertaining to). Thus, 'theurgical' refers to something that pertains to divine work or magical practices.
Think of 'theur-' as relating to divine work, which helps you remember that 'theurgical' pertains to practices involving the divine or magic.