FELONIOUS
criminal, felonious
(adjective) involving or being or having the nature of a crime; “a criminal offense”; “criminal abuse”; “felonious intent”
Source: WordNet® 3.1
Etymology
Adjective
felonious (comparative more felonious, superlative most felonious)
Of, relating to, being, or having the quality of felony
(legal) Done with intent to commit a crime.
Synonyms
(Of, relating to, being, or having the quality of felony): malignant, malicious, villainous, traitorous, perfidious
Source: Wiktionary
Fe*lo"nious, a.
Definition: Having the quality of felony; malignant; malicious; villainous;
traitorous; perfidious; in a legal sense, done with intent to commit
a crime; as, felonious homicide.
O thievish Night, Why should'st thou, but for some felonious end, In
thy dark lantern thus close up the stars Milton.
– Fe*lo"ni`ous*ly, adv.
– Fe*lo"ni`ous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition