Which word means 'easily aroused or changeable'?

• A. Volatile
• B. Waver
• C. Whimsical
• D. Zeal

Answer: (A)

A word that describes something or someone as easily aroused or changeable, especially in mood or state, is volatile. This term captures both quick emotional shifts and instability, much like a volatile substance that can vaporize or react rapidly. In everyday use, you can talk about a volatile temper or a volatile situation to suggest that it is prone to sudden, dramatic changes.

Waver describes hesitation or indecision rather than a propensity to be easily aroused or unstable. Whimsical means playfully capricious or lightly fanciful, which implies unpredictability but with a harmless, charming edge rather than volatility. Zeal refers to intense enthusiasm or passion, not instability or readiness to change.

So volatile best fits the idea of being easily aroused or changeable.