nefarious

the word 'nefarious' entered english in the early 17th century directly from the latin adjective 'nefarius', meaning 'wicked, abominable'. this latin term is itself derived from 'nefas', a noun signifying 'wrong, sin, or crime', which is a compound of 'ne-' (a negative particle meaning 'not') and 'fas' (meaning 'divine law, right'). therefore, the core logic embedded in the word is that which is 'against divine law'. the semantic journey is direct: from the ancient roman concept of a grave violation of moral and cosmic order to the modern english sense of profoundly wicked or villainous behavior.

this word is a simplex loanword from latin. it is not productively formed from separable english morphemes.