erraticism
/ɪˈrætɪsɪzəm/
noun
- The quality or state of being unpredictable, irregular, or inconsistent in behavior, movement, or performance.
- Her erraticism at work — showing up late one day and early the next — confused her manager.
- The old car's erraticism in starting meant we never knew if it would run.
- The erraticism of the stock market made investors nervous.
Antonyms