Where does “irdisch” come from?

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

Ancestry of “irdisch”, step by step

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

Words derived from “irdisch”

Every word from Proto-Indo-European h₁er- →Every word from Proto-Germanic erþō →Every word from Proto-West Germanic erþu →