Where does “serrín” come from?

serrín (Spanish) comes from Latin serrago, from Latin serra, from Proto-Italic serzā, from Proto-Indo-European sers-eh₂, from Proto-Indo-European sers-, from Proto-Indo-European ser- — to flow; to guard; to bind, to tie together.

serrín (Spanish): sawdust

Definitions

sawdust

Ancestry of “serrín”, step by step

Step	Language	Word	Meaning
1	Latin	serrago	sawdust
2	Latin	serra	a saw; a kind of sawfish; a serrated battle order
3	Proto-Italic	serzā	—
4	Proto-Indo-European	sers-eh₂	—
5	Proto-Indo-European	sers-	to cut off
6	Proto-Indo-European	ser-	to flow; to guard; to bind, to tie together

Every word from Proto-Indo-European ser- →Every word from Proto-Indo-European sers- →Every word from Proto-Indo-European sers-eh₂ →