Where does “ředit” come from?

ředit (Czech) comes from Old Czech řěditi, from Slovak riedky, from Proto-Slavic rědъkъ, from Proto-Balto-Slavic redʔ-.

ředit (Czech): to dilute

Definitions

Step	Language	Word	Meaning
1	Old Czech	řěditi	—
2	Slovak	riedky	rare
3	Proto-Slavic	rědъkъ	sparse, rare
4	Proto-Balto-Slavic	redʔ-	—

ředit — Etymology, Origin & Word History | Etymology Explorer