Englishfor English speakers
impact
Noun
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An impact is the act of one object hitting another.
In tests, the driver was unhurt, even in high-speed impacts.
Many buildings were destroyed as the plane exploded on impact.
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The impact is the effect of an act, statement, change, etc.
The report noted that most teachers feel that IT has made little impact on formal education.
The environmental impact of such increases in efficiency, however, depends on how you generate the power.
impact
Verb
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If something impacts you, it has an effect on you.
It is obvious how bad movies will impact on children.
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If you impact something, you press (or pack) its together.
There is a special tool to impact the road when it is under construction so the base is solid.
grinding
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noun
a harsh and strident sound (as of the grinding of gears)
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noun
material resulting from the process of grinding
vegetable grindings clogged the drain
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noun
the wearing down of rock particles by friction due to water or wind or ice