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What does nefarious mean?

Looking for the meaning or definition of the word nefarious? Here's what it means.

Adjective
  1. Sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.
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Examples
They hit us where it hurts and do their damnedest to sell us products we neither want nor need in all manner of nefarious ways.
Through other nefarious means, the spammer has also built up a list of email addresses.
Concerned good citizens who think they may have discovered some nefarious doings should email the anti piracy team here.
If you are here on a search for nefarious things, I'm afraid I have no nefarious things.
If folks know that the media are in cahoots with the cops, then surely they'll deliver a solid beating to anyone recording their nefarious deeds.
My hope is that sufficient pressure will come about to halt the nefarious practices occurring in that accursed place.

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