Is the word timid a prefix or suffix?

"Timid" is neither a prefix nor a suffix. It is a root word, meaning it stands alone and doesn't depend on other parts to form a word.

Here's why:

* Prefixes are word parts that are added before a root word (e.g., "un" in "unhappy").

* Suffixes are word parts that are added after a root word (e.g., "-ness" in "kindness").

"Timid" is a complete word on its own, meaning "showing a lack of courage or confidence."