
Mercurial
Emotional Implication
Suggests someone's mood is unpredictable, which might be viewed negatively.
The coach's mercurial decisions make the team anxious.
Not Literal
'Mercurial' describes behavior, not physical changes or appearances.
His mercurial stance on the project kept everyone guessing.
Use with Caution
Can be insulting if used to describe someone without careful thought.
Being labeled mercurial affected her reputation at work.