Englishfor English speakers
driver
Noun
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A driver is a person who drives.
That man is a driver of cars.
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A driver is a kind of golf club.
The golfer used his driver to hit the ball.
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A driver is a computer program for an application and hardware, made for the device it controls.
The driver is used for the printer.
amplifier
Noun
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An amplifier is an electronic device that increases the strength of a sound or signal.
You need to plug in the amplifier to get any sound.