irritatingly
Their voices are gratingly harsh.
"Indeed I am," she said gratingly.
Nevertheless, he remains gratingly cheerful.
She is gratingly unapologetic about being so condescending.
She was one of those gratingly defensive types whose talents did not include humility or a sense of humour.
The show was far from subtle, and in parts was gratingly coarse.
Their views seemed gratingly old-fashioned.

SMART Vocabulary: related words and phrases

Describing qualities of sound
audibly
boomy
chocolatey
chuff
clomp
crackling
ear-splitting
melodically
melodiously
metallically
murmurous
murmurously
silvery
squeaky
staccato
thready
tinnily
tunefully
tunefulness
tunelessly

You can also find related words, phrases, and synonyms in the topics:

Annoying