Prerequisite – Required beforehand. Must happen before something else can happen
Pre-required for this site (prerequisite) was putting in the sewerage pipes before the foundations went in. It should have happened beforehand.
Examples of prerequisite in a sentence
A prerequisite for joining was that you had to pass a fitness test.
The politician strongly believes that nuclear energy is a prerequisite for satisfying the future energy needs of the world.
Being of upright character is not at all a prerequisite for being a pop star.