OPPORTUNITY - [noun] an occasion that allows you to do something
Examples of use
My new job gives me a great opportunity to travel a lot and meet new people.
She comes from a poor family, which gave her no opportunity to develop her talent.
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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