earth
UK[ɜːθ]US[ɝːθ]
n
The planet on which we live; the world
n
The land surface of the world, as opposed to the sea or air
n
The substance that plants grow in; soil
Etymology
The word 'earth' has a deep and stable lineage, tracing directly back to the ancient Proto-Indo-European root 'er-', which signified the ground or soil. This root gave rise to the Proto-Germanic 'erþō', the common ancestor for related words across Germanic languages, such as German 'Erde' and Dutch 'aarde'. In Old English, it evolved into 'eorþe', retaining its core meaning of the ground or the world. Over centuries, its spelling simplified to 'earth', while its semantic scope expanded from the literal soil underfoot to encompass the entire planetary body, reflecting humanity's growing understanding of its cosmic home.
Analysis
This is a simplex word of Germanic origin. The Old English form 'eorþe' is derived from the Proto-Germanic 'erþō', which in turn comes from the Proto-Indo-European root 'er-' meaning "earth, ground".
Examples
The Earth orbits the Sun once every 365 days.
After the long flight, she was happy to feel solid earth beneath her feet.
We need to turn over the earth in the garden before planting.