砂丘

1. Origins, structure, and basic meaning

• Structure: 砂丘 is read as さきゅう and is a landform noun combining 砂 with 丘, meaning a sand dune.
• Basic usage: It refers to a coastal dune that can be crossed or whose shape gradually changes in the wind.

2. Common pitfalls and similar expressions

• Landform scope
  • It is a natural landform in the coastal and wind context, not merely any pile of sand.
• Number in English
  • Use singular dune for one landform and plural dunes when speaking of the landforms generally.