NSW Opportunity Class
Mercurial
adjective/mur-kyoo-ree-uhl/
subject to sudden or unpredictable changes of mood or mind.
In contextHer mercurial temperament made her a challenging partner.
Remember it
Like the speedy god Mercury and slippery quicksilver — moods that dart and change in a flash.
Use it well
Describes moods and temperaments — 'mercurial temper'; hints at brilliance plus unpredictability.