Where does “parteaguas” come from?

parteaguas (Spanish) comes from Spanish partir, from Latin partīre, from Latin pars, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

parteaguas (Spanish): watershed; watershed, turning point

Definitions

watershed; watershed, turning point

Ancestry of “parteaguas”, step by step

parteaguas traces back through two separate lines of ancestry.

via Spanish partir

Step	Language	Word	Meaning
1	Spanish	partir	to divide, split; to go away, leave, depart; to...
2	Latin	partīre	—
3	Latin	pars	part, side, piece, share; some; faction
4	Proto-Indo-European	per-	before, in front; first; to go through
5	Proto-Indo-European	pr̥tós	passed , crossed

via Spanish agua

Step	Language	Word	Meaning
1	Spanish	agua	water; body of water; rain
2	Old Spanish	agua	water
3	Latin	aqua	water
4	Proto-Italic	akʷā	water
5	Proto-Indo-European	h₂ekʷeh₂	water, flowing water

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Latin pars →