Topic: Why dda rather than da in noswaith dda?
I am learning some Welsh using the free Duolingo.com course.
From early on I have been puzzled as to why dda rather than da in Noswaith dda.
Bore da Good morning
Prynhawn da Good afternoon
Noswaith dda Good evening
Nos da Good night
I now think that I have the answer, but it has raised another puzzle.
The answer, from studying
https://www.bbc.co.uk/bitesize/guides/z … revision/1
and
https://geiriadur.uwtsd.ac.uk/
is that Bore is masculine, Prynhawn is Masculine, yet Noswaith is Feminine, and so a soft mutation of da to dda happens.
Yet Nos is feminine, so why is it Nos da and NOT Nos dda?
William