facinorous (facinorious, facinerious) /fa-SIN-ə-rəs/. adjective. Seriously, jaw-droppingly wicked. From Latin facinorōsus (criminal, wicked), from facinus (deed, especially bad deed).
“Nay, ’tis strange, ’tis very strange, that is the
brief and the tedious of it; and he’s of a most
facinerious spirit that will not acknowledge it”
“I am conscious that in arguing against the “more deadly than the male” conception of the woman criminal I am perhaps doing my book no great service. It might work for its greater popularity if I argued the other way, making out that the subjects I have chosen were monsters of brutality, with arms up to the shoulders in blood, that they were prodigies of iniquity and cunning, without bowels, steeped in hypocrisy, facinorous to a degree never surpassed or even equalled by evil men.” (Victor MacClure)
“Thirdly, consider the utter arrogant and facinorious nature of what the socialists are saying. It is in essence, ‘you produce and we will distribute,’ or ‘you work and we will enjoy the result,’ or more bluntly, ‘we will take from you what you have made.'” (John Bowman)