assiduously bullheadedly devotedly diligently faithfully headstrongly indefatigably industriously insistently loyally obstinately patiently perseveringly persistently persistingly pertinaciously ploddingly relentlessly resolutely sedulously sloggingly stubbornly tenaciously tirelessly unabatingly uncooperatively unfalteringly unflaggingly unflinchingly unintermittingly uninterruptedly unregenerately unrelentingly unremittingly unrestingly unsleepingly unswervingly untiringly unwaveringly unwearyingly wearilessly willfully with set jaw