TO MANIPULATE - [verb] to influence somebody or something in order to control them
Examples of use
The advertisement is manipulating people into buying things that they don't need.
He manipulated his friend in order to get an important piece of information from him.
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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