volatile

adjective

Evaporating readily at normal temperatures and pressures.

adjective

Capable of being readily vaporized.

adjective

Tending to vary often or widely, as in price.

adjective

Inconstant; fickle.

adjective

Lighthearted; flighty.

adjective

Ephemeral; fleeting.

adjective

Tending to violence; explosive.

adjective

Flying or capable of flying; volant.