seif dune
- noun
- /seɪf duːn/
- Specialized
:
duna seif
- The Sahara Desert is home to many impressive seif dunes stretching for miles across the landscape.
Examples
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Scientists studied the formation of seif dunes to understand how wind shapes desert environments.
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A seif dune can reach several hundred kilometers in length, making it a prominent feature of desert regions.
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The seif dune stretched across the desert landscape.
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Many seif dunes can be found in the Sahara.
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The Sahara Desert is home to many impressive seif dunes stretching for miles across the landscape.
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Scientists studied the formation of seif dunes to understand how wind shapes desert environments.
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A seif dune can reach several hundred kilometers in length, making it a prominent feature of desert regions.
Synonyms
69
2.7
A hill of sand that wind makes on a beach or in a desert
14
3.2
A hill of sand that wind makes near a beach or in a desert
How Long
Surface Forms
Morphology
seif + dune
This phrase combines the general English noun 'dune' (a hill of sand), which gives learners a basic category, with 'seif', a specialized loanword/technical label not found in common dictionaries. Because the specific properties that distinguish a seif dune (long, narrow, sharp-crest, wind-oriented) are lexical knowledge tied to 'seif' and are not predictable from general English vocabulary, the expression is only partially transparent to a B1 learner.
Etymology
Seif dune may come from the Arabic word seif meaning 'sword' and dune meaning a hill of 'sand', because these dunes are long, narrow hills with a sharp crest like a blade. So the image of a 'sword' of sand helps explain why the term means a long, narrow sand hill shaped by 'wind'.