Where does “blaenllymu” come from?

blaenllymu (Welsh) comes from Welsh blaenllym, from Welsh llym, from Middle Welsh llymhau, from Proto-Celtic lim-ā-, from Proto-Indo-European sley- — smooth; slick; sticky; slimy; to smear.

blaenllymu (Welsh): to sharpen, to whet

Definitions

to sharpen, to whet

Ancestry of “blaenllymu”, step by step

Step	Language	Word	Meaning
1	Welsh	blaenllym	sharp-tipped, having sharp tips
2	Welsh	llym	keen, harsh, strong, severe; bitter, acrid;...
3	Middle Welsh	llymhau	—
4	Proto-Celtic	lim-ā-	to sharpen
5	Proto-Indo-European	sley-	smooth; slick; sticky; slimy; to smear

Every word from Proto-Indo-European sley- →Every word from Proto-Celtic lim-ā- →Every word from Middle Welsh llymhau →