Where does “Erdaltertum” come from?

Erdaltertum (German) comes from German Altertum, from German alter, from German Alt, from Middle High German alt, from Old High German alt, from Proto-West Germanic ald, from Proto-Germanic aldaz, from Proto-Indo-European h₂eltós — to grow, nourish.

Ancestry of “Erdaltertum”, step by step

Erdaltertum traces back through two separate lines of ancestry.

via German Altertum

StepLanguageWordMeaning
1GermanAltertumantiquity
2Germanalterage, old age
3GermanAltalto; A type of beer, typical to the Rhineland...
4Middle High Germanalt
5Old High Germanaltold
6Proto-West Germanicaldold
7Proto-Germanicaldazold, grown up
8Proto-Indo-Europeanh₂eltós
9Proto-Indo-Europeanh₂él-to grow, nourish

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
Every word from Proto-Indo-European h₂él-Every word from Proto-Indo-European h₂eltósEvery word from Proto-Germanic aldaz
Erdaltertum — Etymology, Origin & Word History | Etymology Explorer