What is the part of speech faithful?

"Faithful" can be several parts of speech depending on its use in a sentence:

* Adjective: Describing a noun, meaning loyal, trustworthy, or true.

* Noun: A person who is loyal and trustworthy.

* Adverb: Meaning "in a faithful manner." This usage is less common.

Examples:

* Adjective: "He was a faithful friend."

* Noun: "The faithful gathered at the church."

* Adverb: "He served his country faithfully."