relentlessly is a form of:

Relentless



adjective
1.
(Harsh, pitiless, persistent, unyielding; without letup; without pity or mercy, not relenting) ដែលមិនអាចធ្វើអោយ ស្ងប់បាន, ដែលគ្មានមេត្ដា, ប្រណី
Example: Narong let no one stand in his way in his relentless drive for power.relentless enemy ដែលឥត ឈប់ឈរ, relentless beating ដែលឥតបង្អង់ដៃ
ENGLISH MEANING
adjective
1.
Unmoved by appeals for sympathy or forgiveness; insensible to the distresses of others; destitute of tenderness; unrelenting; unyielding; unpitying; as, a prey to relentless despotism.