* Verb: This is the most common usage. It means to remove or eliminate something unwanted or harmful.
* Example: "The government purged its ranks of corrupt officials."
* Noun: It can refer to the act of purging or the process of eliminating something.
* Example: "The purge of political opponents was brutal."
* Adjective: This is less common, but it can be used to describe something that is meant for purging or cleaning.
* Example: "The purge solution was used to sterilize the equipment."
So, without context, it's impossible to definitively say which part of speech "purge" is. You need to look at the sentence it's used in to determine its function.