What root means the opposite of beginning?

The root meaning the opposite of beginning is "fin". It comes from the Latin word "finis", meaning "end" or "limit".

Here are some words with the root "fin":

* Final: The last part of something.

* Finish: To bring something to an end.

* Finite: Having a limit or end.

* Definitive: Final and complete.

There are other roots that can also convey the opposite of beginning, such as "termin" (Latin for "end") or "conclud" (Latin for "close").