surplis

Old French surplis, from Medieval Latin superplus, combined super (over, above) with plus (more). The compound was doubly excessive: above, and more. Medieval accounting used the word for what remained after all obligations were met — the amount left over when debts, wages, and costs had been subtracted from income. A lord with a surplus had more grain than his household needed, more wool than his spinners could use.

English adopted surplus in the 14th century. The word moved easily between agricultural, commercial, and governmental contexts: surplus grain, surplus cloth, surplus treasury funds. It described abundance without celebration — the functional remainder, the number at the bottom of the ledger after all the subtractions.

In Marxist economic theory, surplus value became a key concept: the difference between the value workers produce and the wages they receive, which the employer captures as profit. Karl Marx's Das Kapital (1867) built a whole analysis of capitalism on the extraction of surplus value from labor. The medieval accounting term became a philosophical and political weapon.

Today surplus has drifted between the neutral (budget surplus, trade surplus) and the problematic (surplus labor, surplus population — words that have historically preceded dark policies). The word still means left over, above what was required. But what is surplus, and to whom, is always a political question.