n. 25B6; noun PERSISTENCE, determination, perseverance, doggedness, strength of purpose, bulldog spirit, tirelessness, indefatigability, resolution, resoluteness, resolve, firmness, patience, purposefulness, staunchness, steadfastness, staying power, application; stubbornness, intransigence, obstinacy, obduracy; formal pertinacity.
TENACITY
Meaning of TENACITY in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012