Englishfor English speakers
touch
Verb
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If you touch something, you feel it with your hand.
Don't touch the oven -- it's hot and you will get a burn.
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If you touch something, you move so near to it that there is no space between you and it.
sensor
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noun
(= detector)
any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner
spindle
Noun
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A spindle is a rod used for spinning and then winding natural fibres (especially wool)
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A spindle is a rod or pin serving as an axis that revolves.