The current trend is to do away with unnecessary hyphens with common prefixes.
However, there are exceptions.
Exception: Hyphenate all words beginning with the prefix self.
Exception: Use a hyphen with the prefix ex.
Example: His ex-wife sued for nonsupport.
Exception: Hyphenate prefixes when they come before proper nouns.
Posted on Tuesday, February 1, 2011, at 10:33 am6 Comments on Hyphens with Common Prefixes, Part 2