Saoirse wrote:
Scooby wrote:
50. Tá Síle ag dul ______ múinteoireacht ______ rud é go bhfuil a hathair ______ mhúinteoir.
50. Tá Síle ag dul
ag múinteoireacht
???? rud é go bhfuil a hathair
ina mhúinteoir.
I can't think what could fit into the middle gap. I am presuming it is a set phrase '___ rud é', but can't think what it is.

yes
ós [ó + is] rud é.
ós has a síneadh fada here unlike
os cionn/os comhair which don't have a fada usually, except that they do as variants just to keep things from getting too simple!
ag dul ag múinteoireacht .... yes this works, but it's not what I had in mind.
A nice turn of phrase is:
ag dul le múinteoireacht. It's what you say when referring to the so-called caring professions (although not exclusively so) that end in
---cht.
Ba mhaith liom dul le dochtúireacht / dul le sagartóireacht.