bieldar

To winnow grain with a bieldo (a wooden winnowing fork), tossing it into the wind so the lighter chaff blows away and the heavier grain falls back down: bieldar la parva en la era. The standard modern form of the older variant beldar, still tied to traditional, pre-mechanized farming.

• Bieldaron el trigo aprovechando el viento de la tarde. — They winnowed the wheat, making use of the afternoon wind.
• En algunos pueblos todavía se bielda el grano a la manera tradicional. — In some villages grain is still winnowed the traditional way.
• El abuelo enseñó a sus nietos a bieldar en la era. — The grandfather taught his grandchildren to winnow on the threshing floor.

Describes one specific traditional farming step (separating grain from chaff with wind), not a general word for "to clean" or "to sort" — don't extend it beyond that agricultural sense.

Often confused with beldar.