If 'pro' is the opposite of 'con' what is the opposite of 'progress'?

If 'pro' is the opposite of 'con' what is the opposite of 'progress'?

Whether or not it's a pro or con depends upon who you are.

We get volumes of data, pro and con. So often we get volumes for and volumes against, so we don't do anything. If we can't please 1,000 percent, we do nothing.

I'm not being outspoken or pro or con abortion.

Certainly Republicans are talking about the impact — pro or con — that Reed would have on the governor's race. Anybody who says otherwise is a liar or a fool.