volatile
US /ˈvɑː.lə.t̬əl/
UK /ˈvɑː.lə.t̬əl/
1.
liable to change rapidly and unpredictably, especially for the worse
:
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The political situation in the region is highly volatile.
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Stock prices remained volatile throughout the trading day.
2.
(of a substance) easily evaporated at normal temperatures
:
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Gasoline is a highly volatile liquid.
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The chemist warned about the volatile nature of the compound.