an archaic or dialectal form of 'again,' meaning once more or returning to a previous state.
Middle English variant of 'again,' from Old English 'ongen' (opposite/against) which evolved to mean repetition. The 'agen' form reflects regional pronunciation variations.
English has hundreds of words meaning 'again'—'encore,' 're-,' 'afresh,' 'anew'—but most dialects have simplified to just 'again,' making 'agen' a ghostly reminder of how varied medieval English pronunciation was across regions.
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