Yes it means very wicked, villainous.
The word nefarious is found in the English language.
This is a fancy term for evil or wicked. Here are some sentences.I overheard the evil scientist explaining his nefarious plans.You are a nefarious villain!Her nefarious scheme to get revenge shocked me.
The opposite of "nefarious" (wicked or evil) would be good, honorable, virtuous, decent, or upright.
The thief had a nefarious plan to break into the bank vault and steal the valuable jewels. The company was under investigation for engaging in nefarious business practices to manipulate their competitors. The spy had a reputation for carrying out nefarious schemes to gather confidential information for his government.
"The use of Wikianswers to have others do their homework was a nefarious idea."
Understanding is a word to describe you. It begins with the letter U.
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Amorous.
Energetic
sincere
yappy
zealous