Where does “pli” come from?

pli (Esperanto) comes from French plus, from Old French plus, from Latin plūs, from Old Latin plous, from Proto-Indo-European ploh₁is-.

pli (Esperanto): more

Definitions

Step	Language	Word	Meaning
1	French	plus	more, -er; more; the most, -est
2	Old French	plus	more than
3	Latin	plūs	more; more of
4	Old Latin	plous	—
5	Proto-Indo-European	ploh₁is-	—