Englishfor English speakers
infection
Noun
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An infection is when germs enter the body and make it sick.
He had a serious infection from the cut on his arm.
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An infection is the state of being infected.
The doctor had to treat a person with a scabies infection.
expansion
Noun
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The act or process of expanding.
The expansion of metals and plastics in response to heat is well understood.
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A new addition.
My new office is in the expansion behind the main building.
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A product to be used with a previous product.
This expansion requires the original game-board.
rate
Noun
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Speed. A rate is how fast something happens. Something can go at a fast rate or a slow rate.
The rate of water pouring out of the lake into the river is enough to make the lake empty in a year if it doesn't rain.
Her heart rate is 70 beats every minute.
If we keep writing pages at this rate we might have 2000 Simple English Wiktionary words by August 4.
rate
Verb
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Someone rates something when they decide how much its value is (how much it's worth).
I rate this book at six out of ten: it was not the best book.