General:
* Ordinarily
* Normally
* Regularly
* Typically
* Commonly
* Usually
Negative:
* Mediocrely
* Poorly
* Unspectacularly
* Unremarkably
Specific to the context:
* If "extraordinarily" refers to something exceptional, the antonym might be average, typical, or ordinary.
* If "extraordinarily" refers to something remarkable, the antonym might be unremarkable, insignificant, or unnoticeable.
* If "extraordinarily" refers to something special, the antonym might be common, typical, or ordinary.
It's important to consider the specific meaning of "extraordinarily" in your sentence to choose the most appropriate antonym.