unsatisfactory
Definition
not meeting acceptable standards; inadequate or disappointing.
日本語 基準を満たさない、不十分な
Example
"His performance on the exam was unsatisfactory, so he had to retake it."
not meeting acceptable standards; inadequate or disappointing.
日本語 基準を満たさない、不十分な
"His performance on the exam was unsatisfactory, so he had to retake it."