abominably

adverb

I treated her abominably:

reprehensibly, badly, dreadfully, appallingly, brutally, abysmally, nauseatingly, horridly, nastily;

atrociously, horrifyingly, execrably, foully, vilely, wretchedly, miserably, horribly, awfully;

disagreeably, unpleasantly, distastefully;

hatefully, loathsomely, detestably, odiously;

despicably, contemptibly, damnably, diabolically, disgustingly, revoltingly, repellently, repulsively, repugnantly, abhorrently;

informal terribly, shockingly.

▷antonyms well, admirably.

abominably Oxford Dictionary of English