ardently arduously assiduously bec et ongles carefully cautiously circumspectly considerately devotedly diligently doggedly effortfully energetically faithfully fervently hammer and tongs hard heart and soul heedfully indefatigably insistently laboriously lovingly loyally manfully mindfully operosely painstakingly patiently perseveringly persistently persistingly pertinaciously ploddingly regardfully relentlessly resolutely sedulously sloggingly solicitously strenuously tenaciously tenderly the hard way thoroughgoingly thoroughly thoughtfully tirelessly toilsomely tooth and nail unabatingly unfalteringly unflaggingly unflinchingly unintermittingly uninterruptedly unrelentingly unremittingly unrestingly unsleepingly unsparingly unswervingly untiringly unwaveringly unwearyingly vehemently wearilessly with a will with care with effort with great care zealously