insistent

continuing despite difficulties, opposition, or discouragement Margaret Sanger is remembered as an insistent crusader for birth control Synonyms dogged, persistent, patient, persevering, pertinacious, tenaciousRelated Words assured, certain, dedicated, determined, firm, hell-bent, intent, positive, resolute, resolved, single-minded, sure; adamant, bullheaded, dogged, hardened, hardheaded, headstrong, implacable, indurate, mulish, obdurate, obstinate, opinionated, peevish, pertinacious, perverse, pigheaded, self-willed, stiff-necked, stubborn, unregenerate, unyielding, willful (or wilful); unfaltering, unhesitating, unwavering; resistant, wayward, wrongheaded; constant, devoted, faithful, good, loyal, staunch (also stanch), steadfast, steady, true; indomitable, unconquerable; hard, inflexible, relentless, stern, unbending, unflinching, unrelentingNear Antonyms quitting, surrendering, yielding; faltering, hesitant, hesitating, irresolute, vacillating, wavering; disloyal, faithless, false, fickle, inconstant, perfidious, traitorous, treacherous