Supervene is a verb that means to occur later as an additional event.

The basis of our word of the day is provided by the Latin prefix ‘super,’ (SOO per) which means ‘in addition,’ and ‘venire (ven EAR ay) which means ‘come.’ Simply put, when something supervenes, it comes later in a particular event, and in a way that changes the situation. Here’s an example:

The first half of the game was a fast-paced, high-scoring affair. But when the rain supervened in the second half all that scoring came to a halt.