FreeVocabulary
Volatile
/ˈvɒlətaɪl/ adjective easyLikely to change suddenly and unpredictably, especially from calm to dangerous.
The negotiations remained volatile, swinging from near agreement to total collapse within a single day.
Memory Trick
Volatile comes from 'volare,' to fly -- a volatile chemical evaporates and flies off unpredictably, just as a volatile mood can suddenly take off in a new direction.