Where does “Erdmittelalter” come from?

Erdmittelalter (German) comes from German ërde, from Middle High German ërde, from Old High German erda, from Proto-West Germanic erþu, from Proto-Germanic erþō, from Proto-Indo-European h₁er- — earth.

Ancestry of “Erdmittelalter”, step by step

Erdmittelalter traces back through two separate lines of ancestry.

via German ërde

StepLanguageWordMeaning
1Germanërdeearth
2Middle High Germanërdeearth
3Old High GermanerdaThe Earth; earth, ground, soil
4Proto-West Germanicerþuearth, world; earth, soil
5Proto-Germanicerþōearth
6Proto-Indo-Europeanh₁er-earth

via German Mittelalter

StepLanguageWordMeaning
1GermanMittelalterMiddle Ages; middle age; Middle-aged person or...
2Latinmedium aevum
Every word from Proto-Indo-European h₁er-Every word from Proto-Germanic erþōEvery word from Proto-West Germanic erþu