Where does “kastanhu” come from?

kastanhu (Kabuverdianu) comes from Portuguese castanho, from Latin castaneus, from Latin -eus, from Ancient Greek -εῖος, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

kastanhu (Kabuverdianu): brown

Definitions

brown

Ancestry of “kastanhu”, step by step

Step	Language	Word	Meaning
1	Portuguese	castanho	chestnut; brown
2	Latin	castaneus	chestnut; brown
3	Latin	-eus	argentum + API → argenteus; ferrum + API →...
4	Ancient Greek	-εῖος	Forms adjectives, usually with a meaning of "of"...
5	Proto-Indo-European	-iHwós	—
6	Proto-Indo-European	-wós	Creates adjectives from verb stems

Every word from Proto-Indo-European -wós →