清澄

1. Origins, structure, and basic meaning

• Structure: 清澄 is read せいちょう and describes water or air that is clear and pure.
• Basic usage: It describes the clarity of a lake or the purity of forest air.

2. Common pitfalls and similar expressions

• Modifying a noun and making a statement
  • Before a noun, as in 清澄な空気, add な.
  • 清澄だった states that something was clear and pure.
• ほど for degree
  • 底が見えるほど describes the lake's clarity as sufficient to see the bottom.