Volatile --
[vol-uh-tl, -til or, especially Brit., -tahyl]
Etymology: French, from Latin volatilis, from volare: to fly (Date: 1605)
1. Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power/ability to fly.
2. lighthearted, lively, easily affected by circumstances, fickle // easily aroused // tending to erupt into violence
3. difficult to capture or hold permanently : evanescent, transitory
4. Capable of wasting away, or of easily passing into the aeriform state: fleeting; transient: ... volatile beauty.