Unsatisfactory (adjective)

Not meeting requirements or expectations.

Origin:

From un- (prefix meaning "not") + satisfactory (adjective meaning "meeting requirements or expectation.s")

Examples:

1. The results of the experiment were unsatisfactory.
2. His behavior was unsatisfactory and he was dismissed from the company.
3. I found the service unsatisfactory and decided not to return.
4. The quality of the work was unsatisfactory, it needs to be redone.
5. The state of the facilities is unsatisfactory and in need of urgent repair.