Watch out when a situation becomes volatile — it is likely to change for the worse suddenly. If you and your best friend have a volatile relationship, you frequently fight and make up.

Volatile from Latin volatilis, “fleeting, transitory,” always gives the sense of sudden, radical change. Think of it as the opposite of stable. A person who is volatile loses his or her temper suddenly and violently. A volatile political situation could erupt into civil war. When the stock market is volatile, it fluctuates greatly. And in scientific language, a volatile oil evaporates quickly.

In these volatile times… mistakes like Jordan Tower can no longer be tolerated… if, indeed, Jordan Tower was an accident.

But as far as emotions go, Catherine’s were… pretty volatile.

Apparently I’m volatile,selfobsessed, don’t play well with others.

The way it works here, it’s better to be less volatile.

The process is highly volatile.

Bitcoin is very volatile.