staropruski (Polish) comes from Polish Stary, from Old Polish stary, from Proto-Slavic starъ, from Proto-Balto-Slavic staʔros, from Proto-Indo-European steh₂-ro-, from Proto-Indo-European steh₂- — to stand.
staropruski (Polish): Old Prussian
Definitions
Old Prussian
Ancestry of “staropruski”, step by step
staropruski traces back through two separate lines of ancestry.