Nefarious (adj)
ni-f-air-e-us
(typically of an action or activity) wicked or criminal.
I always picture a Fagin type when I hear of someone being nefarious, I think the word has a particularly Dickensian feel about it.
Example sentences
“I know I sure wouldn’t like to meet such dangerous and nefarious characters down a dark alleyway.”
“He has only risen to such dizzying heights through past nefarious activities.”

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