TO GIVE IN - [verb] to yield in an argument or fight
Examples of use
His wife always gives in to his threats. She's too afraid to leave him.
I'm not going to give in to your wishes, father! I will do what I want.
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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