What part of speech is brag?

"Brag" can be either a verb or a noun, depending on how it's used in a sentence.

Verb:

* "He bragged about his new car." Here, "bragged" is the verb, describing the action of boasting.

Noun:

* "His bragging was annoying." Here, "bragging" is the noun, referring to the act of boasting itself.

Let me know if you have any other words you'd like to explore!