Threshing follows reaping and drying, releasing edible grain by beating, trampling, or mechanical action. Traditionally performed with flails or on a threshing floor, it later became mechanised. In poetry, threshing evokes noise, dust, muscular labour, and the decisive separation of useful grain from waste. This physical distinction readily becomes a moral or spiritual metaphor for testing, judgement, purification, and truth revealed under pressure. The scene may also recall communal work and the seasonal transformation of harvest into food.

Threshing separates edible grain from harvested stalks and husks after reaping. Traditional methods included beating with flails, trampling by animals, or dragging sledges across the crop; later machinery mechanised the process. Poetry uses threshing as an image of pressure, testing, judgement, and separation of value from waste. Related terms include flail, grain, chaff, sheaf, threshing floor, winnowing, harvest, and threshing machine.