flagitious

Guilty of terrible crimes; wicked, criminal.

This young Nobleman was not only a flagitious Punster himself, but was accessary to the Punning of others, by Consent, by Provocation, by Connivance, and by Defence of the Evil committed […] .

The duke found his soldiery half disciplined, flagitious, disorderly and inefficient: he rendered them, in his own words, a "perfect organ."

Extremely brutal or wicked; heinous, monstrous.

But if in Noble Minds ſome Dregs remain, / Not yet purg'd off, of Spleen and ſow'r Diſdain, / Diſcharge that Rage on more Provoking Crimes, / Nor fear a Dearth on theſe Flagitious Times.

Less extensively mischievous, tyrannicide would be less flagitious than populicide; murder of one, though he were a Secretary of State; or—but imagination must stop here—than murder of a promiscuous multitude of unarmed men, women, and children.