石灰

1. Origins, structure, and basic meaning

• Structure: 石灰 is read as せっかい and is a noun for lime used on walls or to prepare soil.
• Basic usage: Applying lime to a wall for a white finish appears in 壁に石灰を塗る, while spreading a small amount on a field appears in 少量の石灰をまく.

2. Common pitfalls and similar expressions

• Verbs depend on the use
  • Use 塗る for applying it to a wall surface and まく for spreading it over soil.
• Difference from 石灰石
  • Unlike the word for limestone as a rock used as raw material, this term denotes the lime material actually applied to a wall or soil.