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

Golf is a game in which you yell "Fore!", shoot six, and write down five

Golf can best be defined as an endless series of tragedies obscured by the occasional miracle

Retiring is just practicing up to be dead. That doesn't take any practice.

Dependency arguments often come from elites -- either aid agencies or governments -- and say something about attitudes to poor people,

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