Tàn nhẫn, không thương xót

Không ngơi ngớt, không nao núng; nghiêm khắc, gay gắt

to be relentless in doing something

làm việc gì hăng say không hề nao núng

Không ngừng; luôn luôn, thường xuyên

driven by a relentless urge

được thúc đẩy bởi một sự thôi thúc

adjective

adamant , bound , bound and determined , dead set on , determined , dogged , ferocious , fierce , go for broke , grim , hang in , hang-tough , hard , harsh , implacable , inexorable , inflexible , inhuman , mortal , obdurate , pitiless , remorseless , rigid , rigorous , ruthless , single-minded , stiff , stop at nothing , strict , stringent , unappeasable , unbending , uncompromising , undeviating , unflinching , unforgiving , unrelenting , unstoppable , unyielding , vindictive , incessant , nonstop , persistent , pertinacious , punishing , sustained , tenacious , unabated , unbroken , unfaltering , unflagging , unrelieved , unremitting , adamantine , brassbound , die-hard , incompliant , intransigent , iron , unbendable , uncompliant , around-the-clock , ceaseless , constant , continuous , endless , eternal , everlasting , interminable , ongoing , perpetual , round-the-clock , timeless , unceasing , unending , unfailing , uninterrupted , merciless , severe , steady , stern , unmerciful

adjective

kind , merciful , sympathetic , understanding , ending , intermittent , stopping