frighteningly (adverb)

1. The villain's power was frighteningly strong, overpowering the protagonist in a single blow.

2. The sight of the dragon's fiery breath was frighteningly destructive, leaving nothing but ashes in its wake.

3. She found herself falling in love with him frighteningly fast, unable to resist the connection they shared.

4. The horror movie was filled with frighteningly realistic special effects, leaving the audience on the edge of their seats.