Appal
Definition 1 of 2
Pro Tip 1/3
Emotionally strong
Use 'appal' to express a strong emotional reaction, stronger than 'upset' or 'unhappy'. She was appalled by the animal cruelty she witnessed.
Pro Tip 2/3
Negative events
'Appal' is often associated with negative or disturbing events or behaviors. The corruption in the organization appalled him.
Pro Tip 3/3
Intensity matters
Choose 'appal' if the situation is extreme enough to shock or horrify, rather than mildly disturb. The extent of the poverty in the city appalled the visitors.