Meaning

noun the property of changing readily from a solid or liquid to a vapor

noun the trait of being unpredictably irresolute

noun being easily excited

originEtymology tree English volatile Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English volatility From volatile + -ity.

Etymology from Wiktionary, CC BY-SA 3.0