English
erw
Erw comes from Welsh erw ‘acre’, and goes back to Proto-Indo-European *h₂erh₃-wo- ‘plowable’.
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂erh₃-wo-‘plowable’reconstructed
- Proto-Celticc. 1300–800 BCE*arwīroot as named · steps between not traced
- Welshc. 1500–presenterw‘acre’
- Englishtodaysame form
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂erh₃-wo-‘plowable’reconstructed
- Proto-Celticc. 1300–800 BCE*arwīroot as named · steps between not traced
- Welshc. 1500–presenterw‘acre’
- Englishtodaysame form
Every English word from Proto-Indo-European *h₂erh₃-wo-
Today it means
noun A medieval Welsh unit of surface area equal to 11664 sq ft, or about ¼ acre.
Language periods are conventional ranges, not dates for this word.