If a root word is not complete, what must be added?

The concept of root words is essential in understanding how words are formed in the English language. A root word serves as the base of a word and can often stand alone or be modified with prefixes or suffixes to create new meanings.

In this context, if a root word is deemed incomplete, typically, a suffix is needed to complete its transformation into a more complex word. The suffix "-ibe" is commonly associated with verbs, such as in "prescribe" or "describe," and implies an action related to the root. Therefore, when considering how to make a root word complete, the choice of "-ibe" effectively represents a meaningful action that can be derived from the base word.

The other options listed apply different forms of suffixes that relate to other word classes or meanings and may not necessarily serve to complete a root in the same way that "-ibe" does. Understanding the role of these suffixes helps in recognizing how they attach to roots to give them more significance and functionality in language.