One more example that I have come across is infectus, which can be either the negative of factus (with the meaning "undone, not done, unfinished; impossible") or the perfect passive participle of inficio (with the meaning "stained, dyed, (dis)colored").

One more example that I have come across is infectus, -a, -um, which can be either the negative of factus (with the meaning "undone, not done, unfinished; impossible") or the perfect passive participle of inficio (with the meaning "stained, dyed, (dis)colored").