Where does “risus” come from?

risus (Latin) comes from Ancient Greek ὄρυζα, from Proto-Iranian *wrinǰiš.

Ancestry of “risus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὄρυζα	rice
2	Proto-Iranian	*wrinǰiš	—

risus — Etymology, Origin & Word History | Etymology Explorer