again

The word again began its life as ongean in Old English, meaning something like opposite to or toward. It was a compound of on and gean, where gean carried the sense of facing or against. Wulfstan used it in the early 1000s to mean back or in return, not repetition. The shift from spatial opposition to temporal repetition took centuries.

In Middle English, the spelling settled around agen and agein, and the spatial meaning faded. By the 1200s, scribes at Worcester and Peterborough were writing agein with the sense of once more. The Old Norse gegn, meaning straight and direct, reinforced similar senses in the Danelaw regions of England. Chaucer used again freely in the 1380s with the modern meaning already stable.

The Proto-Germanic root gagin-, meaning against and opposite, connects again to German entgegen and Dutch tegen, both meaning against or toward. These languages preserved the spatial sense that English largely lost. Old High German had gegin, meaning in the direction of. The semantic narrowing in English, from spatial opposition to temporal recurrence, is unusual among the Germanic family.

By the 16th century, again had fully settled into its modern English meaning. Shakespeare used it hundreds of times in the sense of repetition, and the old meaning of opposite had nearly vanished from everyday speech. A fossilized trace survives in against, which kept the adversarial sense that again left behind. The two words were once near-synonyms, diverged by time.