re·lent·less

re·lent·less

adjective

adjective: relentless

oppressively constant;

 incessant.

"the relentless heat of the desert"

synonyms:

persistent, 

continuing, 

constant, 

continual, 

continuous, 

nonstop, 

never-ending, 

unabating, 

interminable, 

incessant, 

unceasing, 

endless, 

unending, 

unremitting, 

unrelenting, 

unrelieved; 

unfaltering, 

unflagging, 

untiring, 

unwavering, 

dogged, 

tenacious, 

single-minded, 

tireless, 

indefatigable; 

pertinacious