assiduously, audaciously, bec et ongles, boldly, bravely, bulldoggishly, chivalrously, committedly, courageously, daringly, decidedly, decisively, determinedly, devotedly, diligently, doggedly, doughtily, earnestly, faithfully, fearlessly, firmly, fixedly, gallantly, gamely, gutsily, hammer and tongs, hardily, heart and soul, heroically, in all seriousness, in earnest, in good earnest, indefatigably, industriously, inflexibly, insistently, intrepidly, knightly, like a bulldog, like a leech, like a man, like a soldier, loyally, obstinately, patiently, perseveringly, persistently, persistingly, pertinaciously, ploddingly, pluckily, purposefully, relentlessly, resolvedly, sedulously, seriously, sincerely, singlemindedly, sloggingly, spunkily, stalwartly, staunchly, steadfastly, steadily, stoutly, tenaciously, tirelessly, tooth and nail, unabatingly, unfalteringly, unfearfully, unfearingly, unflaggingly, unflinchingly, unintermittingly, uninterruptedly, unrelentingly, unremittingly, unrestingly, unsleepingly, unswervingly, untiringly, unwaveringly, unwearyingly, unyieldingly, valiantly, valorously, wearilessly, wholeheartedly, with a will, with constancy, with total dedication, yeomanly