What is the root word of justice?

The root word of "justice" is the Latin word "jus", meaning "law" or "right".

Here's how it works:

* "Jus" evolved into the Latin word "justitia", meaning "justice".

* "Justitia" then passed into English as "justice".

So, essentially, the concept of justice is rooted in the idea of law and what is rightfully due to someone.