verb
COLLOCATIONS FROM CORPUS
■ ADVERB
up
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A year-and-half later, though, with Eithne replacing Elizabeth as second vocalist, the sound has toughened up substantially.
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He was told to toughen up !
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However, the Dulwich experience taught him to toughen up .
EXAMPLES FROM OTHER ENTRIES
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The state is toughening its anti-smoking laws.
EXAMPLES FROM CORPUS
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Both conservatives and Communists have simply toughened their attitude to the government.
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Even better would be cake flour, which contains even less of those toughening proteins, she said.
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Governor Bush has made his mark building prisons, toughening laws on juvenile crime and calling for lower property taxes.
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Just the opposite is true with cake, muffin or quick-bread recipes where too much gluten will toughen the finished product.
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The schools claimed to toughen boys, and they did.
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Thus, cotton consists of cellulose; and so does wood, though wood is toughened with lignin.