Synonyms of unrelenting in English:

unrelenting


See US English definition of unrelenting

See UK English definition of unrelenting

See Spanish definition of implacable

adjective

1‘a vicious, unrelenting guerrilla war’

SYNONYMS
continual, constant, continuous, relentless, unremitting, unabating, unrelieved, sustained, incessant, unceasing, ceaseless, steady, unbroken, non-stop, endless, unending, persistent, perpetual
ANTONYMS

intermittent, spasmodic

2‘he was an unrelenting opponent of the Jacobite cause’

SYNONYMS
implacable, inflexible, uncompromising, unyielding, unbending, inexorable, relentless, resolute, determined, unstoppable, dogged, tireless, unflagging, unshakeable, unswerving, unwavering, assiduous, sedulous
intransigent, merciless, pitiless, unforgiving, unsparing, ruthless, cruel, rigid, rigorous, hard, strict, harsh, stern, adamant, steely, tough