felonious

[ fuh-loh-nee-uh s ]

/ fəˈloʊ ni əs /

Law. pertaining to, of the nature of, or involving a felony: felonious homicide; felonious intent.

wicked; base; villainous.

Origin of felonious

1375–1425; felony + -ous; replacing late Middle English felonous < Anglo-French, Old French

fe·lo·ni·ous·ly, adverb fe·lo·ni·ous·ness, noun non·fe·lo·ni·ous, adjective non·fe·lo·ni·ous·ly, adverb

non·fe·lo·ni·ous·ness, noun un·fe·lo·ni·ous, adjective un·fe·lo·ni·ous·ly, adverb

Only when he heard the indictment, setting forth that he had "feloniously pirated the brig Osprey," he smiled a little.

For the Term of His Natural Life |Marcus Clarke
Instead of fulfilling his mother's charge, he was himself "falsely and feloniously slain" by king Mark.

Character Sketches of Romance, Fiction and the Drama, Vol 1 |The Rev. E. Cobham Brewer, LL.D.
Was it possible that one of the bank's customers was feloniously smuggling merchandise out of town to avoid writs of attachment?

Otherwise Phyllis |Meredith Nicholson
Of this hat he feloniously possessed himself, and returned to Cyprus, where he led a luxurious life.

Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 |Various

In Scots law, the word hamesucken meant the feloniously beating or assaulting a man in his own house.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 |Various

felonious

/ (fɪˈləʊnɪəs) /

criminal law of, involving, or constituting a felony

obsolete wicked; base

feloniously, adverb feloniousness, noun