Definition
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llythyr
Mae 'llythyr' yn golygu dogfen ysgrifenedig a anfonir neu a dderbynnir trwy'r post.
The word 'llythyr' means a written document that is sent or received through the post.
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Ysgrifennais lythyr at fy ffrind heddiw.
I wrote a letter to my friend today.
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Mae'r llythyr hwn yn cynnwys gwybodaeth bwysig.
This letter contains important information.
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Derbyniais lythyr oddi wrth y llyfrgell.
I received a letter from the library.