What is the main part of a word without any affixes?

The main part of a word without any affixes is called the root or base.

Here's a breakdown:

* Root: This is the core meaning of the word, the part that cannot be broken down further. It's often the smallest unit of meaning. Examples:

* "write" in the words "rewrite", "writer", "written"

* "graph" in the words "biography", "autograph", "graphic"

* Base: This is the part of a word to which affixes are added. Sometimes it's the same as the root, but sometimes it can be a combination of root and another morpheme (meaningful unit). Examples:

* "write" in the words "rewrite", "writer", "written"

* "un-happy-ness": "happy" is the base (root + suffix)

Let me know if you'd like more examples or have other questions!