köken: Via Middle Low German from Middle Dutch dûne, from Old Dutch dūna, from Proto-Germanic *dūnǭ. Middle Dutch origin is assured by the German -ü- (compare Süden). The more common Middle Low German form was dûne (with a back vowel -u-); this form may be originally Low German or an earlier borrowing from Dutch. Compare modern Dutch duin.
köken: Inherited from Middle French dune, from Old French dune, from Middle Dutch dūne (modern Dutch duin), from Old Dutch dūn, dūno, from Proto-West Germanic *dūnā (“hill”), of uncertain origin. More at Proto-West Germanic *dūnā.
köken: Borrowed from Middle Dutch dūne, from Proto-West Germanic *dūnā (“hill”), from Proto-Celtic *dūnom (“stronghold”), from Proto-Indo-European *dʰuHnom (“enclosure”), derived from the root *dʰewh₂- (“to finish, come full circle”).
köken: From Middle Dutch dûne, from Old Dutch dūn, dūno, from Proto-West Germanic *dūnā, of uncertain origin, perhaps from Proto-Celtic *dūnom (“stronghold, rampart”).
From Old Norse klettr (“crag”). Cognate with Norwegian klett (“cliff, summit”), Scots clett (“rock in the sea, separated from the cliffs on the mainland”), Old English clit, Ancient Greek κλιτύς f (klitús, “hill”). Doublet of klint.