"cause to feel horror," 1802 (implied in horrified), from horror + -fy, or from Latin horrificare "cause horror." Related: Horrified.
I was horrified at the thought of being late for my interview
The news of the executions horrified us
horribile dictu
horrible
horribly
horrid
horrific
horrify
horripilation
horror
hors d'oeuvre
hors de combat
horse