What is a correct prefix to add agreeable?

The correct prefix to add to "agreeable" depends on the meaning you want to convey. Here are a few options:

* Disagreeable: This prefix means "not" or "opposite of," making the word mean "unpleasant" or "not pleasing."

* Unagreeable: Similar to "disagreeable," this prefix also means "not" and conveys the same meaning of being unpleasant or displeasing.

* Agreeably: This suffix means "in an agreeable manner" and is used to describe something done in a pleasant or pleasing way.

It's important to consider the specific context to choose the most appropriate prefix.