nefarious

[ ni-fair-ee-uhs ]
/ nɪˈfɛər i əs /

adjective

extremely wicked or villainous; iniquitous: a nefarious plot.

Origin of nefarious

1595–1605; < Latin nefārius wicked, vile, equivalent to nefās offense against divine or moral law ( ne- negative prefix + fās law, right) + -ius -ious, with intervocalic s > r

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British Dictionary definitions for nefarious

nefarious
/ (nɪˈfɛərɪəs) /

adjective

evil; wicked; sinful

Derived forms of nefarious

nefariously, adverb nefariousness, noun

Word Origin for nefarious

C17: from Latin nefārius, from nefās unlawful deed, from not + fās divine law