1. resembling or characteristic of a demon; evil or cruel in an extreme way
Usage: formal
2. showing wild, frenzied, or possessed behavior
Usage: formal

Examples

• The villain’s demoniacal laughter echoed through the castle.
• She gave him a demoniacal grin before revealing her evil plan.
• The storm raged with demoniacal fury throughout the night.
• His demoniacal behavior frightened everyone at the party.
• The character’s demoniacal possession was the climax of the horror film.
• With demoniacal energy, he worked through the night without rest.