Where does “пена” come from?

пена (Serbo-Croatian) comes from Proto-Slavic pěna, from Proto-Balto-Slavic *(s)páināˀ, from Proto-Indo-European (s)poH(y)-, from Proto-Indo-European speh₁- — to succeed, to prosper.

пена (Serbo-Croatian): foam

Definitions

  1. foam

Ancestry of “пена”, step by step

StepLanguageWordMeaning
1Proto-Slavicpěnafoam
2Proto-Balto-Slavic*(s)páināˀ—
3Proto-Indo-European(s)poH(y)-foam
4Proto-Indo-Europeanspeh₁-to succeed, to prosper
Every word from Proto-Indo-European speh₁- →Every word from Proto-Indo-European (s)poH(y)- →Every word from Proto-Balto-Slavic *(s)páināˀ →