Where does “seatearth” come from?

seatearth (English) comes from English Earth, from Middle English erthe, from Old English eorþe, from Proto-West Germanic erþu, from Proto-Germanic erþō, from Proto-Indo-European h₁er- — earth.

seatearth (English): The layer of sedimentary rock underlying a coal...

Definitions

  1. The layer of sedimentary rock underlying a coal...

Ancestry of “seatearth”, step by step

seatearth traces back through two separate lines of ancestry.

via English Earth

StepLanguageWordMeaning
1EnglishEarthThe third planet of the Solar System; the world upon which humans live
2Middle EnglishertheEarth; the world; The Earth's people or...
3Old Englisheorþeground; the planet Earth; dirt
4Proto-West Germanicerþuearth, world; earth, soil
5Proto-Germanicerþōearth
6Proto-Indo-Europeanh₁er-earth

via English seat

StepLanguageWordMeaning
1EnglishseatSomething to be sat upon; A location or site; The...
2Middle Englishsete
3Old Englishsǣtehouse
4Proto-Germanicsētijąseat
5Proto-Indo-Europeansḗd-to sit
Every word from Proto-Indo-European h₁er-Every word from Proto-Germanic erþōEvery word from Proto-West Germanic erþu