dune (n.)

1790, from French, Middle Dutch or Middle Low German dune, all perhaps from Gaulish *dunom (thus related to down (n.2)). The French dune "sand hill" (13c.) is held by Diez to be an Old French borrowing from Dutch duin or some other Germanic source. Italian and Spanish duna are from French. Dune buggy attested by 1965.

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