Where does “irdisc” come from?

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

Ancestry of “irdisc”, step by step

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

Words derived from “irdisc”

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