I remember this one from video games as a kid. How are you with reedit? ;)
A lot of those prefix words used to be hyphenated until people got used to them, even things like to-morrow way back in the day. Some of the stodgier publications (like the New Yorker) still use things like diaeresis (two dots about a letter) to mark words like coördination, whereas it's all but fallen out of use otherwise except possibly occasionally showing up in noël.