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| English | Russian |
| a thorn in the flesh | заноза (досл. "колючка в (чьей-л.) плоти": My professor was an environmental activist when he was younger, and apparently he has become a thorn in the flesh for oil companies over the years.  thefreedictionary.com Aly19) |
| thorn in the flesh | заноза (masc and fem) |