volatile:1

adjective
vol*a*tile \ ˈvä-lə-tᵊl \ -ˌtī(-ə)l \
1605{ds||3||}
  • characterized by or subject to rapid or unexpected change
  • unable to hold the attention fixed because of an inherent lightness or fickleness of disposition
  • tending to erupt into violence : explosive

volatile:2

noun
volatile \
1686
  • a substance that is readily vaporizable at relatively low temperature : a volatile substance

volatile oil

noun
volatile oil \
1800
  • an oil that vaporizes readily; especially : essential oil

sal volatile

noun
sal vo*la*ti*le \ ˌsal-və-ˈla-tə-lē \
1654
  • smelling salts
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