adj. unflagging, determined, indefatigable, dogged, persevering, perseverant, tireless, unwearying, unwearied, dogged, dedicated, unfailing, unfaltering, steady Kim has always been an untiring perfectionist
UNTIRING
Meaning of UNTIRING in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012