volatile
adj
1 (of a liquid) changing rapidly into vapour (指液體)易揮發的.
2 (espderog 尤作貶義) (of a person) changing quickly from one mood or interest to another; fickle (指人)情緒或興趣多變的, 無常性的
a highly volatile personality, disposition,nature, etc 反覆無常的個性、 性情、 天性等.
3 (of trading conditions, etc) likely to change suddenly or sharply; unstable (指商情等)很可能急劇波動的, 不穩定的
volatile stock-markets, exchange rates 不穩定的股市、 匯率
a volatile political situation, eg one that could lead to a change of government 動蕩不定的政局.