Where does “crasfeydd” come from?

crasfeydd (Welsh) comes from Welsh crasfa, from Welsh crasu, from Welsh -u, from Middle Welsh -u, from Proto-Brythonic -oβ̃ — Forms verbal nouns, originally from thematic...

Ancestry of “crasfeydd”, step by step

Step	Language	Word	Meaning
1	Welsh	crasfa	beating, thrashing, battery
2	Welsh	crasu	to bake, to toast
3	Welsh	-u	impression, imprint
4	Middle Welsh	-u	—
5	Proto-Brythonic	-oβ̃	Forms verbal nouns, originally from thematic...

Every word from Proto-Brythonic -oβ̃ →Every word from Welsh -u →Every word from Middle Welsh -u →