Which word would best describe a system that is disorganized and changes frequently?

The term "dynamic" effectively captures the essence of a system that is disorganized and changes frequently. A dynamic system is characterized by constant movement, growth, or change, reflecting a lack of stability and predictability. This means that within a dynamic environment, outcomes can vary widely, and one cannot easily forecast what will happen next due to the ongoing shifts and lack of structure.

In contrast, a stable system would suggest order and consistency, which does not align with the description of frequent changes and disorganization. "Static" also implies a lack of change, indicating an unchanging or fixed state, which contradicts the idea of a system that evolves frequently. Lastly, the word "predictable" conveys a sense of reliability and expected outcomes, which is the opposite of the disorganized nature implied in the question. Thus, "dynamic" is the most fitting descriptor for a system characterized by constant change and disarray.