dune
/djuːn/noun
- a mound or ridge of sand or other loose sediment formed by the wind, especially on the sea coast or in a desert（尤指海岸或沙漠中的）沙丘, 土丘：
a sand dune.
一座沙丘。
词源
late 18th cent.: from French, from Middle Dutch dūne; related to Old English dūn 'hill' （see DOWN3 ）.