A couple times this week, I’ve come across issues with bi- words. The first time, it was “bi-monthly.” Now, is that twice a month or every two months? The second time, it was “bi-weekly.” Is that twice a week, or every two weeks? I’m just not sure.
You see the problem, right?
This is a great example of the Curse of Knowledge, which I often summarize as “just because you know what you’re talking about doesn’t mean anybody else does.” You simply can’t use these words to say what you want to say, clearly and with no confusion, unless your audience already knows exactly what you’re referring to. Best to avoid them.
All of which seems so obvious to me that I feel I must be insulting your intelligence. Yet I come across things like this all the time — and am probably guilty of doing it too. It’s so easy for us to forget that other people might have no idea what we’re talking about.