mercurialness

Synonyms for mercurialness: volatility, fickleness, capriciousness, temperamentalness, unpredictability, erraticness.

Definitions

The quality of being subject to sudden or unpredictable changes of mood or mind.

The state of being volatile, fickle, or quick-witted.

The mercurialness of the stock market makes it nearly impossible for novice investors to predict long-term trends.

Her mercurialness kept her friends on edge, as they never knew if she would be cheerful or deeply melancholic from one hour to the next.

The artist's mercurialness was reflected in his work, which shifted abruptly from somber realism to vibrant abstraction.