PROVIDER - [noun] a person, company or organisation that provides something
Examples of use
Banks are still major providers of financial services to people.
I'm not satisfied with my Internet provider; there are connection failures every single day and the prices are still rising.
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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