(adv.) In a keen manner.

acerbically acerbly acidly acridly acrimoniously actively animatedly anxiously ardently avidly bitingly bitterly breathlessly briskly caustically con brio cordially corrodingly corrosively cuttingly eagerly energetically enthusiastically excitedly exuberantly fervently fervidly forcefully forcibly glowingly hardly heart and soul heartily heatedly impassionedly impatiently incisively intensely kindly lustily mordaciously mordantly passionately penetratingly piercingly promptly quickly rancorously readily scathingly scorchingly sharply sorely spiritedly stabbingly strenuously tartly trenchantly vigorously vivaciously warmly with alacrity with gusto with open arms with pep with relish with zest witheringly zealously zestfully