* Adjective: This is the most common usage. It describes something as holy, consecrated, or set apart for religious use.
* Example: "The temple was a sacred place of worship."
* Noun: This usage refers to something that is considered holy or sacred.
* Example: "The sacred texts were carefully preserved."
* Past participle: It can act as a past participle of the verb "to sacre" (to consecrate), though this usage is less common.
* Example: "The land was sacred by the ancient priests."
Let me know if you have a specific sentence in mind and I can help you determine the part of speech of "sacred" in that context.