Where does “śyaHwás” come from?

śyaHwás (Proto-Indo-Aryan) comes from Proto-Indo-Iranian ćyaHwás, from Proto-Indo-European ḱyeh₁-wó-s — dark; deep brown.

Ancestry of “śyaHwás”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-Iranian	ćyaHwás	black-brown, dark-brown, dark
2	Proto-Indo-European	ḱyeh₁-wó-s	dark; deep brown

śyaHwás — Etymology, Origin & Word History | Etymology Explorer