CHARITY - [noun] an organisation that helps people in need; money or goods given to people in need
Examples of use
The Red Cross is a charity that operates in most countries.
They are too proud to accept charity of other people.
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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