* Unsatisfactory: Means not meeting expectations or standards.
* Highly: Means very satisfactory or excellent.
* Most: Means the most satisfactory option.
* Partially: Means only somewhat satisfactory.
* Completely: Means fully satisfactory.
* Super: Means exceptionally satisfactory.
* Sub: Means below satisfactory or barely acceptable.
The best prefix will depend on the context and the specific nuance you want to convey.