What part of speech is the word matter?

The word "matter" can be several parts of speech, depending on how it's used in a sentence:

* Noun: It refers to the physical substance of which things are made.

* Example: "The table is made of wood, a solid matter."

* Verb: It means to be important or significant.

* Example: "It doesn't matter what you think."

* Verb: It can also mean to be of concern or interest.

* Example: "I matter to my family and friends."

To determine the correct part of speech, you need to look at how it's used in the sentence.