From Middle High German geweide or ingeweide, mostly attributed to hunter's idiom, the guts being thrown to the dogs as their food, and then a derivation from Weide (“food, pasture”), ultimately from Proto-Indo-European *weyh₁- (“chase, persecute”).
Others have suggested a connection to the tree name Weide (“willow”), in the sense of “something wound up, convoluted”, and then from Proto-Indo-European *weh₁y- (“to turn, rotate”). Compare Latin viscera (“internal organs, entrails”).
Eingeweide n (genitive Eingeweides, plural Eingeweide)
- “Eingeweide” in Duden online