I have read the rules for using im- versus un- and agree with the general ideas put forth. A word that I used recently, seems to fall into a category all its own. The word is (im)provable, meaning not provable. I Provable is an adjective, so is the opposite of provable (un)provable or (im)provable? If it is (im)provable, that violates another meaning of the word, ie: something that can be improved. Or should it be nonprovable?
closed as off-topic by Peter Shor , chasly from UK, tchrist♦, anongoodnurse, Mitch Oct 10 '15 at 13:58
This question appears to be off-topic. The users who voted to close gave this specific reason:
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The opposite of provable is unprovable:
Unable to be demonstrated by evidence or argument as true or existing