Where does “pobrísimo” come from?

pobrísimo (Spanish) comes from Spanish pobre, from Old Spanish pobre, from Latin pauper, from Latin pavo-pars, from Proto-Indo-European pau- — smallness.

Ancestry of “pobrísimo”, step by step

Step	Language	Word	Meaning
1	Spanish	pobre	poor
2	Old Spanish	pobre	—
3	Latin	pauper	poor
4	Latin	pavo-pars	getting little
5	Proto-Indo-European	pau-	smallness

Every word from Proto-Indo-European pau- →Every word from Latin pavo-pars →Every word from Latin pauper →