hei"nous*ly
Webster's Dictionary (GCIDE)
Heinous \Hei"nous\ (h[=a]"n[u^]s), a. [OF. ha["i]nos hateful, F. haineux, fr. OF. ha["i]ne hate, F. haine, fr. ha["i]r to hate; of German origin. See Hate.] Hateful; hatefully bad; flagrant; odious; atrocious; giving great offense; -- applied to deeds or to character. [1913 Webster]
It were most heinous and accursed sacrilege. --Hooker. [1913 Webster]
How heinous had the fact been, how deserving Contempt! --Milton.
Syn: Monstrous; flagrant; flagitious; atrocious. -- Hei"nous*ly, adv. -- Hei"nous*ness, n. [1913 Webster]