Where does “nadmnožina” come from?
nadmnožina (Czech) comes from Czech množina, from Czech mnohý, from Old Czech mnohý, from Proto-Slavic mъnogъ, from Proto-Balto-Slavic managas, from Proto-Indo-European monogʰos, from Proto-Indo-European mengʰ-.
nadmnožina (Czech): superset
Ancestry of “nadmnožina”, step by step