volatile

不安定な、変わりやすい、怒りっぽい

急に変わったり、すぐに怒りや暴力、危険が生じたりしやすい。

やさしい英語で： Likely to change suddenly or become angry, violent, or dangerous quickly.

• The situation remains volatile.
• His volatile temper makes people nervous.
• Prices have been volatile since the crisis began.

類義語： unstable, unpredictable, changeable

反対語： stable

よく使う表現： a volatile situation, volatile markets, a volatile temper

揮発性の

液体や固体から気体に変わりやすい。

やさしい英語で： Changing easily from a liquid or solid into a gas.

• Alcohol is a volatile liquid.
• Keep volatile solvents in closed containers.
• Heat causes the volatile compounds to escape into the air.

反対語： nonvolatile

よく使う表現： volatile liquids, a volatile solvent, volatile compounds

volatile変数

予期せず値が変わるため、直接読み書きする必要がある変数。

やさしい英語で： A programming variable whose stored value must be read or updated directly because it may change unexpectedly.

• The compiler treats this variable as a volatile.
• Reading a volatile retrieves its current stored value.
• This hardware register is represented by a volatile.

よく使う表現： declare a volatile, read a volatile, write a volatile