Final answer:
A synonym for 'capricious' and 'unpredictable' would be 'mercurial' or 'fickle', which signify someone or something that is subject to sudden, unpredictable changes and is unstable and short term.
Step-by-step explanation:
A synonym for 'capricious' and 'unpredictable' would be 'mercurial' or 'fickle'.
These words describe someone whose mood, mind, or behavior changes suddenly and without prediction, much like how the term 'capricious' conveys the sense of being subject to sudden, unpredictable changes.
Similarly, 'unpredictable' denotes the inability to be predicted or certain about future developments.
Both 'mercurial' and 'fickle' suggest a pattern that is unstable and short term, aligning with the characteristics of being capricious and unpredictable.