Appalling
/əˈpɔːlɪŋ/
verb
To fill with horror; to dismay.
“The evidence put forth at the court appalled most of the jury.”
To make pale; to blanch.
To weaken; to reduce in strength
Synonyms: affright, daunt, depress, dismay, frighten, scare, terrify
adjective
Horrifying and astonishing.
“That was an appalling waste of money.”
Extremely bad; terrible