TO FALL APART - [verb] to break into pieces; become separated
Examples of use
The old book is falling apart. It lacks some pages.
Their marriage is falling apart. I always knew that they don't suit each other.
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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