earth

English earth comes from Middle English erthe, from Old English eorþe, from Proto-West Germanic *erþu, from Proto-Germanic *erþō ("dirt, ground, earth"), ultimately from Proto-Indo-European *h₁érteh₂ ("earth").

The word has stayed remarkably close to its root sense throughout its recorded history, meaning soil, ground, or the world itself at every stage from Old English onward.

Its Proto-Indo-European root is thought to connect to words for boundaries and fields, such as Welsh erw ("acre") and Sanskrit urvarā ("fertile soil, field yielding crops"), suggesting a deep link between land and its measured or cultivated edges.