What is the prefix to visible?

There isn't a single, commonly used prefix specifically for "visible". However, depending on the context, you might use:

* In-: To indicate the opposite of visible, as in "invisible".

* Vis-: This is a more general prefix related to sight, used in words like "vision" and "visualize".

* Pre-: You could use this to indicate something that precedes visibility, like "previsible" (though this is not a standard word).

The best prefix to use depends on the specific meaning you want to convey.