relentless
Concise Oxford English Dictionary © 2008 Oxford University Press:
relentless/rɪˈlentləs/
▶adjective
- 1 oppressively constant.
- 2 harsh or inflexible.
– derivatives
relentlessly adverb,
relentlessness noun.
relentlessly adverb,
relentlessness noun.
'relentless' also found in these Oxford entries:

