Here's a simple explanation:
* Prefix: A word part added to the *beginning* of a word (e.g., "un" in "unhappy").
* Suffix: A word part added to the *end* of a word (e.g., "ing" in "walking").
* Root word/Base word: The core meaning of a word that remains after removing prefixes and suffixes.
For example, in the word "unbreakable":
* "un" is a prefix.
* "able" is a suffix.
* "break" is the root word or base word.