Where does “eider” come from?

eider (Low German) comes from Icelandic æður, from Old Norse æðr, from Proto-Germanic ēþrō, from Proto-Indo-European ēt-er- — stomach, intestines.

Ancestry of “eider”, step by step

StepLanguageWordMeaning
1Icelandicæðureider; vein; wadable
2Old Norseæðrvein; eider
3Proto-Germanicēþrōvein
4Proto-Indo-Europeanēt-er-stomach, intestines

Words derived from “eider”

Every word from Proto-Indo-European ēt-er- →Every word from Proto-Germanic ēþrō →Every word from Old Norse æðr →