BREACH - [noun] an act of breaking or not fulfilling a promise or a law
Examples of use
His breach of promise to marry her was a big shock for everyone. They were so in love with each other.
I will take a legal course of action in case of your breach of our contract.
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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