adjective Date: circa 1592 showing or promising no abatement of severity, intensity, strength, or pace ; unrelenting , ~ly adverb ~ness noun
RELENTLESS
Meaning of RELENTLESS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012