nefariousness

ne·far·i·ous  (n-fâr-s)

adj.

Infamous by way of being extremely wicked.

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[Latin nefrius, from nefs, crime, transgression : ne-, not; see ne in Indo-European roots + fs, divine law; see dh- in Indo-European roots.]

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ne·fari·ous·ly adv.

ne·fari·ous·ness n.

Thesaurus

Noun

1.

nefariousness - the quality of being wicked vileness, ugliness, wickedness evilness, evil - the quality of being morally wrong in principle or practice; "attempts to explain the origin of evil in the world" filthiness - moral corruption or pollution; "this deformity and filthiness of sin" enormity - the quality of extreme wickedness