HORRIFYING
atrocious, frightful, horrifying, horrible, ugly
(adjective) provoking horror; “an atrocious automobile accident”; “a frightful crime of decapitation”; “an alarming, even horrifying, picture”; “war is beyond all words horrible”- Winston Churchill; “an ugly wound”
Source: WordNet® 3.1
Verb
horrifying
present participle of horrify
Adjective
horrifying (comparative more horrifying, superlative most horrifying)
Tending to inspire horror; that horrifies; horrific.
Synonym: Thesaurus:frightening
Source: Wiktionary
HORRIFY
Hor"ri*fy, v. t. [imp. & p. p. Horrified; p. pr. & vb. n.
Horrifying.] Etym: [L. horrificare. See Horrific.]
Definition: To cause to feel horror; to strike or impress with horror; as,
the sight horrified the beholders. E. Irving.
Source: Webster’s Unabridged Dictionary 1913 Edition