Antonym fun

There are many words in english that you can negate by adding a prefix such as un-, il-, non-, etc.  However, several of these words are much more common in their negation than their root form.  It's always fun inserting a few of these uncommon root forms into speech:

- Complain about maculate code.
- Refer to the person who screws things up as peccable.
- Rail against nocent government policies.
- Compliment people by telling them that they look kempt.

There was a short story that I recall reading quite some years ago that was based around the use of such root words.  Alas I cannot recall the title or the author or I'd link it from here.

The page below relates a few other interesting words in the same vein:
- The opposite of indefatigable is just fatigable (both in- and de- are dropped).
- The antonym of incline is disincline, not decline ("I was inclined to follow his suggestion", "I was disinclined to follow his suggestion")

Oh, the English language: travesty or endless supply of riches?

http://www.rinkworks.com/words/negatives.shtml