VOLATILE

adj. 1 vaporizing, evaporable, evaporative A volatile solvent, which evaporates quickly, is the vehicle for thermosetting plastics 2 changeable, fickle, flighty, inconstant, erratic, restless, unstable, variable, mercurial, capricious She was so volatile that one could never predict what she would do next 3 explosive, hair-trigger, sensitive, charged, eruptive, tense, tension-ridden Be careful of Christine's volatile temper