The negative prefix is un-. This make the word unorganized.
The word reliable does not have a prefix but it does, however, have a suffix and the suffix is -able.
The prefix 'dis' would change agreeable to a negative.
un-
unambitious
The prefix of reliable is "re-" and the suffix is "-able."
The negative prefix of "active" is "in-" or "inactive".
The negative prefix of "friendly" is "un-."
The negative prefix for wealthy is "un-".
The negative prefix of sympathetically is "un-".
The negative prefix for "function" is "dys-".
The negative prefix for "settle" is "un-".
The negative prefix of "exposed" is "un-".
The negative prefix of "array" would be "non-".
The negative prefix for the word "do" is "un-".
The negative prefix is un-. This make the word unorganized.
The negative prefix added to proportionate is "dis-."