the underground economy
noun/ði ˌʌndəɡraʊnd ɪˈkɒnəmi/
/ði ˌʌndərɡraʊnd ɪˈkɑːnəmi/
(North American English) (British English the black economy)
[singular]- business activity or work that is done without the knowledge of the government or other officials so that people avoid paying tax on the money they earnTopics Moneyc2
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the underground economy