DEMONIACAL Meaning of DEMONIACAL in English demoniacal BrE AmE ˌdiːm ə ʊ ˈna ɪ ‿ək ə l ◂ AmE \ ˌ•ə-▷ demoniacal|ly ‿i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012