* Noun: This is the most common usage, referring to a soft, boggy area of ground.
* Example: "We got stuck in a quagmire of mud."
* Metaphorical noun: It can also be used figuratively to describe a difficult or confusing situation.
* Example: "The political debate became a quagmire of conflicting arguments."
* Adjective: Less common, but "quagmire" can also be used as an adjective meaning "resembling a quagmire".
* Example: "The quagmire terrain made travel difficult."
So, the specific part of speech depends on the context of the sentence.