The first round in Only Connect is where you get a row of four things, and you have to work out what they have in common, and then you have to come up with a fifth example.
So .. if you had big, massive, huge, giant ...you might come up with " monumental"
or if you had fish, cow, elephant, bluebottle ..you might say " cat" or "ant" or "iguana."
or if you had half, quarter, full, hunch you might come up with flash- or set- .
Right ... let's have some Welsh ones now ...
[a] Bilidowcar Saeth Draig Groenwyn ?
[b] Cynffon Methu Cesair Hoel ?
[c] Cacen Cryman Wyneb Bys ?
[d] Troed Caled Gwyro Basged ?
Ho-ho !! good luck with that, and if you got them all, or even if you didn't, you can look forward to the next round. Or not.
Yn y cyfamser, here's a spot of that music stuff .... it's geiriau stuff as well ....