* Unstable: Its behavior or movement is irregular and difficult to predict.
* Chaotic: It lacks order and predictability.
* Inconsistent: It varies significantly from time to time.
Here are some examples of how "erratic" can be used:
* "The stock market has been erratic lately." (The prices are fluctuating wildly and unexpectedly.)
* "Her mood was erratic, swinging from joy to despair." (Her emotions were unpredictable and inconsistent.)
* "The plane's flight path was erratic due to the strong winds." (The plane was moving in an uneven and unpredictable manner.)
In short, erratic refers to something that is unpredictable and lacks a consistent pattern.