* Adjective: This is the most common usage, meaning "of a good enough standard or quality".
* Example: "She gave a decent performance."
* Adverb: Used to describe a verb, adjective, or another adverb, meaning "in a satisfactory way."
* Example: "He did the job decently."
* Noun: While less common, "decent" can be used as a noun, referring to something that is considered good or acceptable.
* Example: "We all need to show each other a bit of decency."
So, to determine the part of speech, you need to look at how it's used in the sentence.