TO CONTEMPLATE - [verb] to consider something very carefully for a long time
Examples of use
He spent all night contemplating his next move to exclude the possibility of making mistake.
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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.
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