Heinous

Heinous (hā"nus) , adjective

[Old French hainos hateful, French haineux, from Old French haine hate, French haine, from hair to hate; of German origin. See Hate.]

Hateful; hatefully bad; flagrant; odious; atrocious; giving 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