* If "unexceptionally" means "in a way that is not exceptional", then the antonym would be exceptionally, remarkably, outstandingly, or extraordinarily.
* If "unexceptionally" means "in a way that is not unusual", then the antonym would be uniquely, exceptionally, or unusually.
* If "unexceptionally" means "in a way that is not outstanding", then the antonym would be exceptionally, outstandingly, or remarkably.
To find the most accurate antonym, consider the specific context in which "unexceptionally" is used.