VILLAIN - [noun] the main bad character in a play, film, story
Examples of use
The villain is always punished at the end of a story.
I'd rather see Jack Nicholson play the villain of this film, rather than the good hero.
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English speaking practise
Remember that if you don't use that word in English conversations or writing you'll forget it in a short time. So the best thing you can do to learn this word is just trying to use it in speaking or writing. Remember also that practise is the key to fluent english speaking.
You can always find a partner, who would also like to improve his/her