(adv.) In a bitter manner.

abominably acerbically acerbly acidly acridly acrimoniously agonizingly awfully baldly balefully bitingly blatantly brashly caustically confoundedly corrodingly corrosively cruelly cuttingly damnably deadly deathly deucedly distressingly dolorously dreadfully egregiously excessively excruciatingly exorbitantly extravagantly flagrantly frightfully grievously hardly hellishly horribly improperly incisively inexcusably infernally inordinately intolerably keenly lamentably miserably mordaciously mordantly nakedly openly painfully penetratingly piercingly piteously rancorously sadly scathingly scorchingly sharply shatteringly shockingly something awful something fierce sorely stabbingly staggeringly tartly terribly torturously trenchantly unashamedly unbearably unconscionably unduly unpardonably witheringly woefully