揮発

1. Origins, structure, and basic meaning

• Structure: 揮発 is read as きはつ and is a verbal noun for a liquid becoming vapor, used intransitively in 液体が揮発する.
• Basic usage: It appears in scientific contexts involving an uncovered liquid or the effect of temperature on volatilization rate.

2. Common pitfalls and similar expressions

• Subject particle
  • The substance that volatilizes is marked with が, as in 液体が揮発する.
• Noun link
  • Use 揮発の速さ to connect the phenomenon to the rate being measured.