/ˈvɑː.lə.t̬əl/
likely to change suddenly and unexpectedly, especially by getting worse:
Food and fuel prices are very volatile in a war situation.
The situation was made more volatile by the fact that people had been drinking a lot of alcohol.
likely to change emotional state very suddenly, especially by becoming angry:
He had a volatile temper and couldn’t have been easy to live with.
She is volatile and unreliable.