Where does “pasaru” come from?

pasaru (Kabuverdianu) comes from Portuguese pássaro, from Old Portuguese passaro, from Vulgar Latin passarum, from Latin passer, from Proto-Indo-European peth₂- — to spread out; to fly.

pasaru (Kabuverdianu): bird

Definitions

bird

Ancestry of “pasaru”, step by step

Step	Language	Word	Meaning
1	Portuguese	pássaro	passerine any bird of the order
2	Old Portuguese	passaro	—
3	Vulgar Latin	passarum	genitive feminine plural of passus
4	Latin	passer	sparrow; turbot
5	Proto-Indo-European	peth₂-	to spread out; to fly

Every word from Proto-Indo-European peth₂- →Every word from Latin passer →Every word from Vulgar Latin passarum →