HEINOUSLY
heinously, monstrously
(adverb) in a terribly evil manner; “the child was heinously murdered”
Source: WordNet® 3.1
Etymology
Adverb
heinously (comparative more heinously, superlative most heinously)
In a heinous manner.
Source: Wiktionary
HEINOUS
Hei"nous, a. Etym: [OF. haĂŻnos hateful, F. haineux, fr. OF. haĂŻne
hate, F. haine, fr. haĂŻr to hate; of German origin. See Hate.]
Definition: Hateful; hatefully bad; flagrant; odious; atrocious; giving
great great offense; -- applied to deeds or to character.
It were most heinous and accursed sacrilege. Hooker.
How heinous had the fact been, how deserving Contempt! Milton.
Syn.
– Monstrous; flagrant; flagitious; atrocious.
– Hei"nous*ly, adv.
– Hei"nous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition