It comes from the Latin word "findere", which means "to cleave" or "to split".
Here are some examples of words that contain the root "fiss":
* Fissure: A narrow opening or crack.
* Fission: The process of splitting an atom.
* Bifid: Divided into two parts.
* Fissil: Capable of being split.
Let me know if you have any other words you'd like to explore!