It's interesting that "proactive" has been used as an example for functionality. According to the New York Times Everyday Dictionary of 1982, the word means "favoring the first learned -- inhibition". Obviously, that is just the opposite of how the word is popularly used. The word now has no function because the meaning must be determined by the context. "Pro-active" might be a proper spelling for the current usage, but that doesn't help in an oral presentation.