ˌde ‧ mo ‧ ni ‧ a ‧ cal /ˌdiːməˈnaɪək ə l◂/ BrE AmE ( also de‧mo‧ni‧ac /dɪˈməʊniæk $ -ˈmoʊ-/) adjective formal
wild, uncontrolled, and evil:
the demoniacal glint in his dark eyes
—demoniacally /-kli/ adverb
ˌde ‧ mo ‧ ni ‧ a ‧ cal /ˌdiːməˈnaɪək ə l◂/ BrE AmE ( also de‧mo‧ni‧ac /dɪˈməʊniæk $ -ˈmoʊ-/) adjective formal
wild, uncontrolled, and evil:
the demoniacal glint in his dark eyes
—demoniacally /-kli/ adverb
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012