Etymograph

English

erw

Erw comes from Welsh erw ‘acre’, and goes back to Proto-Indo-European *h₂erh₃-wo- ‘plowable’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₂erh₃-wo-‘plowable’reconstructed
  2. Proto-Celticc. 1300–800 BCE*arwīroot as named · steps between not traced
  3. Welshc. 1500–presenterw‘acre’
  4. Englishtodaysame form

attested reconstructed ? uncertain or disputed

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₂erh₃-wo-‘plowable’reconstructed
  2. Proto-Celticc. 1300–800 BCE*arwīroot as named · steps between not traced
  3. Welshc. 1500–presenterw‘acre’
  4. Englishtodaysame form

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.

Etymograph / Proto-Indo-European *h₂erh₃-wo- / erw