氷

1. Origins, structure, and basic meaning

• Structure: The spelling is 氷, read as こおり. It is a noun for water in its frozen solid state or for pieces of frozen water placed in a drink.
• Basic usage: Putting ice into water appears in 水に氷を入れる, while ice forming across a pond appears in 池に氷が張る.

2. Common pitfalls and similar expressions

• Difference from 水
  • It is the same substance in a frozen solid state rather than its liquid state.