windfall

In medieval England, tenants were often forbidden from cutting timber on the land they farmed. Trees belonged to the lord of the manor. But wood blown down by the wind was a different matter. Fallen branches and toppled trees — windfalls — could be gathered by tenants for fuel and building material. The wind did what the tenant's axe could not. A windfall was free wood, and free wood was a genuine economic event for people who could not afford to buy it.

The word appears in English land charters and manorial records from the thirteenth century onward. The legal distinction was precise: standing timber was the lord's property; wind-felled timber was the tenant's. Some manors specified this in writing. Others fought about it. The courts of medieval England spent real time determining whether a particular tree had been blown down by wind or helped along by human hands.

The figurative meaning emerged by the sixteenth century. A windfall was any unexpected gain: an inheritance from an unknown relative, a sudden business success, a lucky discovery. The metaphor was transparent — something of value that fell into your hands without effort, as if blown by wind. By the eighteenth century, the figurative use had overtaken the literal one. Few English speakers think of fallen trees when they hear the word.

Modern English uses windfall almost exclusively in its figurative sense. A 'windfall profit' is an unexpected gain, often in financial or political contexts. 'Windfall tax' describes a levy on unexpected profits — oil companies, tech firms, pandemic beneficiaries. The medieval tenant gathering storm-felled wood has been replaced by a corporation reporting quarterly earnings. The scale changed. The concept did not.