What is the word part meaning of in?

The word part "in" doesn't have a specific meaning on its own. It's often used as a prefix, meaning:

* Into: "In" can indicate movement or direction into something.

* Example: inside, insert, invade

* On: "In" can sometimes indicate a state of being on or within something.

* Example: inside, involved, insane

* Within: "In" can also indicate something existing or happening within something else.

* Example: internal, interview, inside

It's important to note that the meaning of "in" can vary depending on the context.

If you're looking for the meaning of a specific word that includes "in," you'll need to consider the full word and how it's used in a sentence.