extremely wicked or villainous; iniquitous: a nefarious plot.
Origin: 1595–1605; < Latinnefārius wicked, vile, equivalent to nefās offense against divine or moral law (ne- negative prefix + fās law, right) + -ius-ious, with intervocalic s > r
To reduce or lower, as in rank, office, reputation, or estimation; degrade.
not able to be corrected
making or having a harsh sound; grating; creaking:
flow eg. efflux
Hazy, vague, indistinct, or confused: lacking clear defined form: a nebulous recollection of the meeting; a nebulous distinction between pride and conceit.
1604, from L. nefarius "wicked, abominable," from nefas "crime, wrong, impiety," from ne- "not" (see un-) + fas "right, lawful, divinely spoken," related to fari "to speak" (see fame).