disagreeable is a word but be careful in what context your using it in or it won't make sense
The prefix 'dis' would change agreeable to a negative.
co-operate
The noun form of the adjective 'agreeable' is agreeableness.
There is no single correct prefix
Con-
There is not a prefix in agreeable, however, there is a suffix. The suffix is -able.
One possible prefix for "agreeable" is "dis-", changing the meaning to "disagreeable."
The correct prefix to add to "fashionable" is "un-", resulting in "unfashionable."
The prefix 'dis' would change agreeable to a negative.
A possible correct prefix to add to "spoken" could be "un", resulting in "unspoken", which means something that is not expressed in words.
A correct prefix to add to "alcoholic" could be "non-," changing it to "non-alcoholic," which means without alcohol.
co-operate
"In" as in "inadequate," meaning less than adequate or lacking.
"I agree with you." or "That is agreeable to me." The word agreeable has to do with your own personal feelings.
The noun form of the adjective 'agreeable' is agreeableness.
"In" as in "inadequate," meaning less than adequate or lacking.
There is no single correct prefix