Lat. ārea f. 'ground, space, threshing floor' < āreō v. ‘to be dry’ < PItal. *ās-ē- v. 'to be dry' < PIE. *h₂eh₁s-eh₁- v. 'to be dry'. "Semantically... 'the area cleared by burning' > 'any open area' (MDV). MDV
Robert Farren, PIE culture words collection, 2017
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