ENGINE - [noun] a machine which produces power from steam, electricity, oil to make something move
Examples of use
James Watt's invention of the engine was a major step to the Industrial Revolution.
A car won't start when the engine is out of order.
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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