Where does “eadar-rìoghachd” come from?

eadar-rìoghachd (Scottish Gaelic) comes from Scottish Gaelic eadar, from English Eider, from Swedish ejder, from Low German eider, from Icelandic æður, from Old Norse æðr, from Proto-Germanic ēþrō, from Proto-Indo-European ēt-er- — stomach, intestines.

eadar-rìoghachd (Scottish Gaelic): interregnum

Definitions

  1. interregnum

Ancestry of “eadar-rìoghachd”, step by step

eadar-rìoghachd traces back through two separate lines of ancestry.

via Scottish Gaelic eadar

StepLanguageWordMeaning
1Scottish Gaeliceadarbetween
2EnglishEiderthe boundary between Schleswig and Holstein
3Swedishejdereider; common eider, the species "Somateria...
4Low Germaneider—
5Icelandicæðureider; vein; wadable
6Old Norseæðrvein; eider
7Proto-Germanicēþrōvein
8Proto-Indo-Europeanēt-er-stomach, intestines

via Scottish Gaelic rìoghachd

StepLanguageWordMeaning
1Scottish Gaelicrìoghachdkingdom
2Middle Irishrígdachtkingliness, kingly qualities; kingdom
3Middle Irish-acht—
Every word from Proto-Indo-European ēt-er- →Every word from Proto-Germanic ēþrō →Every word from Old Norse æðr →