TO CLING - [verb] to hold tightly to something; to stick to something; to continue to believe that someting is right or true, because you want to believe it
Examples of use
The child is extremely shy and always keeps clinging to its mother.
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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