Where does “trzewa” come from?

trzewa (Polish) comes from Old Polish trzewa, from Proto-Slavic červo, from Proto-Balto-Slavic ker-m/w-.

Ancestry of “trzewa”, step by step

StepLanguageWordMeaning
1Old Polishtrzewaentrails, guts, innards, viscera
2Proto-Slavicčervobelly; intestine, gut, bowel
3Proto-Balto-Slavicker-m/w-—
Every word from Proto-Balto-Slavic ker-m/w- →Every word from Proto-Slavic červo →Every word from Old Polish trzewa →