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mushroom

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verb [intransitive] mushroom pronunciation in American English /ˈmʌʃˌrum/ 
Word Forms
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present tense
I/you/we/theymushroom
he/she/itmushrooms
present participlemushrooming
past tensemushroomed
past participlemushroomed
  1. to increase or develop very quickly

    Trade between the two countries has mushroomed.

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