factum - how do I use in a sentence.

If it's a root word, are there any words with factum in them? I can't find any.

"Ex post factum" prosecution for breaking laws passed after the misdeed is prohibited by the U.S. Consitution.

Isn't that spelled facto, not factum?!

The term "factum" is a Latin word that means "a thing that has been done" or "a fact." Although it is not commonly used in modern English sentences, you can still include it in your writing in specific contexts. Here's an example of how you can use it in a sentence:

"The factum of the matter is that she was unaware of the consequences of her actions."

As for words derived from "factum," it's important to note that "factum" primarily functions as a root word in Latin. However, it has influenced the formation of words in other languages, such as legal terms like "factum est" (meaning "it is done") or "factum probandum" (meaning "a fact requiring proof").

In English, the term "factum" is not commonly found as a stand-alone word or root in contemporary vocabulary. It's more prevalent in legal jargon and historical discussions. So, it is understandable that you may not come across many words with "factum" in them.