Where does “валун” come from?

валун (Ukrainian) comes from Russian -у́н, from Proto-Slavic *-unъ — er.

валун (Ukrainian): boulder

Definitions

  1. boulder

Ancestry of “валун”, step by step

StepLanguageWordMeaning
1Russian-у́н—
2Proto-Slavic*-unъer
Every word from Proto-Slavic *-unъ →Every word from Russian -у́н →
валун — Etymology, Origin & Word History | Etymology Explorer