Where does “ryza” come from?
ryza (Polish) comes from Lower Sorbian ryzy, from Proto-Slavic ryďь, from Proto-Balto-Slavic rūˀdjas, from Proto-Indo-European h₁ruHdʰ-yo-s, from Proto-Indo-European h₁rudʰ-yo-s, from Proto-Indo-European h₁rewdʰ- — red.
ryza (Polish): ream, 500 pages of paper
Ancestry of “ryza”, step by step