Where does “motoserra” come from?

motoserra (Catalan) comes from Catalan serra, from Old Catalan serra, 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.

motoserra (Catalan): chainsaw

Definitions

chainsaw

Ancestry of “motoserra”, step by step

Step	Language	Word	Meaning
1	Catalan	serra	saw; sierra, mountain range
2	Old Catalan	serra	—
3	Latin	serra	a saw; a kind of sawfish; a serrated battle order
4	Proto-Italic	serzā	—
5	Proto-Indo-European	sers-eh₂	—
6	Proto-Indo-European	sers-	to cut off
7	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 →