grievously is a form of:

Grievous



adjective
1.
(Deplorable, atrocious, showing or full of grief, causing grier, outrageous, glaring) ដែលលំបាក, ចិត្ដ, ដែលសម្ដែងអំពីឃោឃៅ, អាក្រក់ណាស់, ដែលគ្មានមេត្ដា, ដែលកើតទុក្ខខ្លាំង
Example: A grievous wrong, a grievous mistake.grievous news ដែលធ្វើអោយព្រួយ, grievous fault ដែលធ្ងន់ៗ
ENGLISH MEANING
adjective
1.
Causing grief or sorrow; painful; afflictive; hard to bear; offensive; harmful.
2.
Characterized by great atrocity; heinous; aggravated; flagitious; as, a grievous sin.
3.
Full of, or expressing, grief; showing great sorrow or affliction; as, a grievous cry.