What's the adjective for appal? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs appall and appal which may be used as adjectives within certain contexts.
“His daughters were appalled at his behavior. He insulted the waitress. He drank too much. He glared at his wife and stuck out his tongue to annoy her.”
“I am absolutely appalled that anyone should be attacked in this manner.”
“We are continually appalled by revelations of the corruption and godlessness prevalent around us.”