Appall (verb)

1. Fill (someone) with horror or disgust.
2. To shock or dismay greatly.

Origin:

Mid 17th century (in the sense "stun, make senseless"): from french appaler, from a- (from latin ad "to") + pâlir "grow pale".

Examples:

1. The sight of the accident appalled him.
2. The atrocities of war appalled the world.
3. The cruelty of the act appalled everyone who witnessed it.
4. The state of the environment appalls me.
5. The neglect of the animals appalls me.