(adv.) In a monstrous manner; unnaturally; extraordinarily; as, monstrously wicked.

abjectly abominably arrantly atrociously basely contemptibly despicably eerily execrably fancifully fantastically flagrantly foully grossly grotesquely heinously meanly miserably mysteriously nefariously obnoxiously odiously outlandishly peculiarly pettily poorly quaintly queerly scurvily shabbily shoddily singularly strangely supernaturally vilely wretchedly