* Interjection: When used as an exclamation of annoyance or frustration, "Darn" is an interjection.
* Example: "Darn it! I forgot my keys."
* Adverb: "Darn" can be used as an adverb to mean "very" or "extremely."
* Example: "That was a darn good movie."
* Informal adjective: In some informal contexts, "Darn" can be used as an adjective meaning "bad" or "unfortunate."
* Example: "I got a darn headache."
It's important to note that "Darn" is generally considered informal and may not be appropriate in all situations.