appalling
You have behaved appallingly.
They were appallingly ignorant of the real situation.
The film was appallingly bad.
The whole thing was appallingly tacky.
SMART Vocabulary: related words and phrases Serious and unpleasant
abominable
abominably
abysmal
abysmally
apocalyptic
frightful
from hellidiom
fun
ghastliness
Gothically
noxiously
objectionable
objectionably
odious
odiously
unpleasantness
unpretty
unspeakable
unspeakably
unsupportable
You can also find related words, phrases, and synonyms in the topics:
Not of good quality