GRE重点词汇解析：volatile

　　volatile: 不稳定的; easily aroused or changeable; lively or explosive

　　1) evaporating easily; explosive, changeable

　　2) 1. a. tending to vary often or widely, as in price

　　b. inconstant; fickle

　　c. lighthearted; flighty

　　d. ephemeral; fleeting

　　2. tending to violence; explosive

　　3) changeable; explosive; evaporation rapidly

　　4) readily changing to a vapor; changeable; fick; explosive

　　5) easily aroused or changeable; lively or explosive

　　* n. volatility

　　instable : volatility :: harmonious : congruence

　　craven : heroic :: volatile : constant (OPPOSITE)

　　volatile : temper :: ready : wit

　　volatile : evaporate :: soluble : dissolve

　　volatile <> constant, stable

　　imperturbability volatility

　　Fearing the substitute teacher’s volatile temper, the children were quiet and obedient.

　　Syn: volatility, gaseous; capricious, unstable，capricious, erratic, fickle, inconsistent, inconstant, mercurial, temperamental

　　His volatile personality made it difficult to predict his reaction to anything.

　　多变的： characterized by or subject to rapid or unexpected change

　　【例】a boss of volatile moods 一个性情多变的老板‖The stock market can be very volatile. 股 市瞬息万变。

　　【近】 capricious, changeable, fluid, inconstant, mercurial, skittish, temperamental, variable, versatile

　　【反】 certain, changeless, constant, immutable, invariable, settled, stable, stationary, steady, unchangeable, unvarying 固定的，不变的

　　【派】 volatility n. 易变性，易挥发性