terribly
holy fuck
blood-curdling
bloodcurdling
terrify
transfix
pant-wettingly
threaten
aghast
holy catfish
alarmistically
terrorize
terrorise
put the wind up
curl someone's hair
worry someone sick
rain fire and brimstone
alarmingly
fearfully
panic
frighteningly
overfrighten
consternation
scare
kreistle
sinisterly
astonishable
bewitch
funk
shake
gloppen
agh
pants-shittingly
hey
wild-eyed
make someone's jaw drop
dismayingly
make someone's skin crawl
scare the living daylights out of
aagh
bomb
scaringly
frighten the piss out of
scarecrow
antisensational
breathtakingly
horrified
petrification
sicken
embarrassingly