Where does “castaño” come from?

castaño (Galician) 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.

castaño (Galician): chestnut brown; chestnut wood

Definitions

  1. chestnut brown; chestnut wood

Ancestry of “castaño”, step by step

StepLanguageWordMeaning
1Portuguesecastanhochestnut; brown
2Latincastaneuschestnut; brown
3Latin-eusargentum + API → argenteus; ferrum + API →...
4Ancient Greek-εῖοςForms adjectives, usually with a meaning of "of"...
5Proto-Indo-European-iHwós—
6Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wós →Every word from Latin -eus →Every word from Ancient Greek -εῖος →