demonically
adverb
UK/dɪˈmɒn.ɪ.kᵊl.i/
US/dɪˈmɑː.nɪ.kᵊl.i/
Definitions of demonically adverb
in a manner that is wild, evil, and suggestive of a demon
The actor glared demonically at the audience from the stage.
She was demonically driven by a desire for revenge.
He typed demonically at the keyboard, his fingers flying.