Englishfor English speakers
tooth
Noun
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A tooth is a hard, white thing in your mouth. You use your teeth to chew food.
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A tooth is a sharp point sticking out of something and forms a row of sharp objects for cutting.
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A tooth is a rounded point on a gear that is used to transmit or receive force and motion to other gears.
contact
Noun
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When mathx/math makes or has contact with mathy/math, they touch each other physically.
The trains in Tokyo are so crowded that everyone has to stand in close contact to everyone else.
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By extension, its use as a metaphor:
He wore dark glasses so that he wouldn't have to make eye contact with anyone.
"Did you tell Chris about lunch today?" "No, I wasn't able to get in contact with him."
contact
Verb
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If A contacts B, A telephones B or writes a letter or e-mail to B.
If I can help further please do not hesitate to contact me at 012-345-6789.
per
Preposition
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for each; during each
Double rooms with full breakfast are £40 per person per night.
minute
Noun
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A minute is a short time equal to sixty seconds. There are sixty minutes in one hour.
He ran the race in 1 minute and ten seconds.
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A minute is a short time.
Please wait a minute while I get my coat and then I will come with you.
minute
Adjective
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Minute things are small.
The pictures appear similar, with only a few, minute differences.