terribly
US /ˈter.ə.bli/
UK /ˈter.ə.bli/

1.
very; extremely
:
•
I'm terribly sorry for the inconvenience.
•
She sings terribly well.
2.
in a very bad or unpleasant way
:
•
The team played terribly in the second half.
•
He was injured terribly in the accident.