demon
['di:mәn]
n. 魔鬼

1. That child is a little demon.
   那孩捣蛋鬼。
2. Her husband is a demon for work.
   她丈起精。
3. He's very violent: it's the demon drink, you know.
   撒酒疯，道喝那种酒。

demon
[ noun ]

1. an evil supernatural being

<noun.person>

2. a cruel wicked and inhuman person

<noun.person>

3. someone extremely diligent or skillful

<noun.person>
he worked like a demon to finish the job on time
she's a demon at math

Demon \De"mon\, n. [F. d['e]mon, L. daemon a spirit, an evil
spirit, fr. Gr. dai`mwn a divinity; of uncertain origin.]
1. (Gr. Antiq.) A spirit, or immaterial being, holding a
middle place between men and deities in pagan mythology.

The demon kind is of an intermediate nature between
the divine and the human. --Sydenham.

2. One's genius; a tutelary spirit or internal voice; as, the
demon of Socrates. [Often written {d[ae]mon}.]

3. An evil spirit; a devil.

That same demon that hath gulled thee thus. --Shak.