(adv.) In a staid manner, sedately.

actively ardently assiduously bec et ongles committedly decidedly decisively decorously demurely determinedly devotedly devoutly dingdong down exhaustively fervently fervidly firmly fixedly for real formally gravely grimly hammer and tongs heart and soul heartily heatedly impassionedly in all seriousness in earnest in good earnest inflexibly intensely intently like a bulldog like a leech obstinately painstakingly passionately perfervidly perseveringly persistently purposefully relentlessly resolutely resolvedly sedately seriously sincerely singlemindedly sober-mindedly soberly sobersidedly solemnly somberly staidly staunchly steadfastly steadily tenaciously thoroughly thoughtfully tooth and nail unremittingly unswervingly unyieldingly vehemently wholeheartedly with a will with constancy with total dedication zealously