volatile

Adjective

• tending to vary often or widely
  • volatile stocks
    
  • volatile emotions
    

• marked by erratic changeableness in affections or attachments
  • fickle friends
    
  • a flirt's volatile affections
    

• liable to lead to sudden change or violence
  • an explosive issue
    
  • a volatile situation with troops and rioters eager for a confrontation
    

• evaporating readily at normal temperatures and pressures
  • volatile oils
    
  • volatile solvents
    

Noun

• a volatile substance; a substance that changes readily from solid or liquid to a vapor
  • it was heated to evaporate the volatiles
    

Related words

• Synonyms: 
  fickle , explosive
• Antonyms: 
  nonvolatile , nonvolatilizable , nonvolatilisable