This morning’s musing on #Cymraeg by this confused #dysgwr - what is up with the number three? Duo is little help with explanations as to why three is tri, tair and dair. The same case could be made for pedwar and all its forms.
This tŵt brought to you by four desks, six farmers and the number thirty-three
@fforiwr 2, 3 and 4 in Welsh have a masculine and feminine version - dau/dwy, tri/tair, pedwar/pedair. So if you're describing a masculine noun (or a mixture of M & F), you'd use the masculine form, and the feminine form for feminine nouns. dair (and bedair) are mutations which occur e.g. when the number is both feminine and used as an adjective (e.g. mae'r ferch yn bedair oed). Hope that helps explain it.
@siaronj That’s awesome, thank you! It’s one of the various downfalls of using Duo - it doesn’t explain things like this.