Word Origin & History
downO.E. dun "hill," from Celtic word for "hill, citadel" (cf. O.Ir. dun "hill, hill fort," and second element in place names London, Verdun, etc.), from PIE base *dheue- "to close, finish, come full circle" (cf. O.E. dun "hill," M.Du. dune "sandy hill"). Meaning "elevated rolling grassland" is from c.1300.
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