Acceptable
Part of speech: adjective
Definition: Capable, worthy, or sure of being accepted or received with pleasure; pleasing to a receiver; gratifying; agreeable; welcome; as, an acceptable present, one acceptable to us. Barely worthy, less than excellent; passable.
Example sentence: Stress is nothing more than a socially acceptable form of mental illness.
Unimpeachable
Part of speech: adjective
Definition: not able to be impeached or reproachedblamelessbeyond doubt