Synonyms to the hard way

hammer and tongs, arduously, bec et ongles, committedly, decidedly, decisively, determinedly, devotedly, earnestly, effortfully, firmly, fixedly, hard, heart and soul, in all seriousness, in earnest, in good earnest, industriously, inflexibly, laboriously, like a bulldog, like a leech, manfully, obstinately, operosely, perseveringly, persistently, purposefully, relentlessly, resolutely, resolvedly, seriously, sincerely, singlemindedly, staunchly, steadfastly, steadily, strenuously, tenaciously, toilsomely, tooth and nail, unswervingly, unyieldingly, wholeheartedly, with a will, with constancy, with effort, with total dedication, Herculean, Philistine, about, absolute, abstruse, accented, acerb, acerbic, acrid, acrimonious, actively, acute, adamant, adamantine, addictive, adverse, afflictive, agonizing, agonizingly, alcoholic, all but, almost, along toward, alveolar, amaroidal, anesthetic, angry, antagonistic, apical, apico-alveolar, apico-dental, approximately, ardent, ardently, arduous, around, articulated, assiduous, assiduously, assimilated, astringent, at close qua