appalling

/əˈpɔlɪŋ/

adjective

Causing shock or dismay; horrific.

shocking,horrific,horrifying,horrible,terrible,awful,dreadful,ghastly,hideous,horrendous,frightful,atrocious,abominable,abhorrent,outrageous,hateful,loathsome,odious,gruesome,grisly,monstrous,nightmarish,heinous,harrowing,dire,vile,shameful,unspeakable,unforgivable,unpardonable