fiend

1. N-COUNT If you describe someone as a fiend, you mean that they are extremely wicked or cruel. 惡魔[書麪]

A tearful husband repeated calls for help in catching the fiend who battered his wife. 淚流滿麪的丈夫再三呼訏協助抓住毆打他妻子的那個惡棍。

2. N-COUNT Fiend can be used after a noun to refer to a person who is very interested in the thing mentioned, and enjoys having a lot of it or doing it often. 對...有嗜好的人; 著魔者[n N]

...if you're a heavy coffee drinker or a tea fiend. ...假如你喝很多咖啡或者嗜茶。