Question

the word semicircle contains the root semi. what does the root semi mean? many one - half four

Explanation:

The word "semicircle" is composed of the root "semi -" and "circle". A circle is a full round shape. A semicircle is half of a circle. In English, the root "semi -" commonly means "one - half". For example, "semi - final" means half of the final stage (in a competition context, it's the stage before the final, which is half - way to the final in a sense of elimination rounds).

Answer:

one - half