volatile in English

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adj. 1. evaporating rapidly at ordinary temperatures; changing into vapor easily.
Ex. Gasoline is volatile.
2. (Figurative.) changing rapidly from one mood or interest to another; fickle; frivolous.
Ex. He has a volatile disposition an

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noun volatileness.

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noun 1. a volatile matter or substance.
2. a winged creature, such as a bird or a butterfly.
Ex. As to the volatiles of this country, there are turkeys ... parrots, woodquists (John Davies).

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volatile, adjective, noun.