Jay Bee - it is just gloine fíona. Gloine fhíona doesn't exist. You have to read literature to know this - and I'm not sure this would be clear from grammar books, which overcomplicate the presentation. But "glass of wine" is just gloine fíona.

I'm only trying to explain things I read or see on the net. I suppose it fitted into what looked like an interesting pattern.

What do you make of cos chrainn?

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__̴ı̴̴̡̡̡ ̡͌l̡̡̡ ̡͌l̡*̡̡ ̴̡ı̴̴̡ ̡̡͡|̲̲̲͡͡͡ ̲▫̲͡ ̲̲̲͡͡π̲̲͡͡ ̲̲͡▫̲̲͡͡ ̲|̡̡̡ ̡ ̴̡ı̴̡̡ ̡͌l̡̡̡̡.___

Cos chraínn = a wooden leg
Cos craínn = the base of a tree???

Of course, cos is feminine. I'm going round in circles. I'd best leave off it till tomorrow

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__̴ı̴̴̡̡̡ ̡͌l̡̡̡ ̡͌l̡*̡̡ ̴̡ı̴̴̡ ̡̡͡|̲̲̲͡͡͡ ̲▫̲͡ ̲̲̲͡͡π̲̲͡͡ ̲̲͡▫̲̲͡͡ ̲|̡̡̡ ̡ ̴̡ı̴̡̡ ̡͌l̡̡̡̡.___