Englishfor English speakers
device
Noun
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A device is a small machine or tool.
She has a device in her kitchen for cutting garlic.
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A device is a machine or part attached to a computer, such as a keyboard, mouse, printer etc.
The mouse is an important device for using the computer.
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A device is a clever way of doing something.
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A device is a logo.
capability
Noun
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We say that someone has a capability when they are capable of doing something; that means they are able to do it.
He has great capabilities in using computers, but he always forgets to go to school on time.