Nefarious means evil or criminal, and not in a small, everyday way. You use it for plans, deeds, and people that feel wicked — stealing, cheating on a large scale, dark schemes.

Nefarious means evil or criminalnefarious意思是邪惡或帶有犯罪性質的，and not in a small, everyday way而且不是那種芝麻小事的程度。You use it for plans, deeds, and people that feel wicked你會用它來形容感覺很邪惡的計畫、行為和人 — stealing, cheating on a large scale, dark schemes偷竊、大規模的詐騙、陰險的陰謀。

It is a formal, slightly dramatic word. News writers and storytellers like it; friends almost never say it about a classmate who was rude.

It is a formal, slightly dramatic word這是個正式、帶點戲劇感的詞。News writers and storytellers like it新聞寫作者和說故事的人喜歡用它；friends almost never say it about a classmate who was rude但朋友之間幾乎不會拿它來說某個同學很沒禮貌。

Though actually, English speakers often use it with a little smile, as if they are putting on a villain's cape: 'his nefarious plan to steal the last biscuit'. The tidy dictionary says 'evil or criminal', and that is true, but in real talk the word is often a bit like acting in a play.

Though actually不過其實，English speakers often use it with a little smile英語使用者常常帶著點笑意用這個詞，as if they are putting on a villain's cape好像自己披上了反派的斗篷：'his nefarious plan to steal the last biscuit'「他偷最後一片餅乾的nefarious計畫」。The tidy dictionary says 'evil or criminal'字典乾淨俐落地說「evil or criminal」，and that is true這是對的，but in real talk the word is often a bit like acting in a play但在真實對話裡，這個詞常常有點像在演戲。

It is not a gentle word for 'naughty' or 'a bit wrong'.

It is not a gentle word它不是個溫和的詞 for 'naughty' or 'a bit wrong'用來說「調皮」或「有點不對」。