Definition
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Nac ydw
Mae 'nac ydw' yn ymateb negyddol i gwestiwn neu gais.
‘Nac ydw’ is a negative response to a question or request.
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Wyt ti am fynd i'r sinema heddi? Nac ydw.
Do you want to go to the cinema today? No.
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Ydy hi'n gweithio yn y swyddfa? Nac ydw, mae hi'n ymddeol.
Does she work in the office? No, she is retired.
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Wyt ti'n hoffi coffi? Nac ydw, dwi'n well gennyf de.
Do you like coffee? No, I prefer tea.