terribly is a form of:

Terrible



adjective
1.
(Extreme, intense, very bad, severe, causing extreme discomfort, unpleasant) ដែលអាក្រក់, ដែលគូរអោយខ្លាច, ដែលអន់ណាស់
Example: A terrible storm, A tenable cold in the head, As a lecturer, he's terrible!, a terrible book; a terrible mess.
2.
(បច្ចេកទេស) ខ្លាំងណាស់, អន់ណាស់
ENGLISH MEANING
adjective
1.
Adapted or likely to excite terror, awe, or dread; dreadful; formidable.
2.
Excessive; extreme; severe.