No, in an accent meant to sound Russian.(interjection)
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Use "nyet" in a sentence
"Along with the word nyet, it was the extent of his Russian vocabulary."
"Our prediction is that the IIHF will say nyet, which is another way of saying they'll do nothing!"
"And Chinese Premier Wen Jia Bao followed Putin with a "Bu Shi" ( "nyet" in Mandarin) when he extolled China's growing energy and trade ties to Iran to a visiting Iranian Vice President."