What type of word is the responsible?

"Responsible" can be several parts of speech depending on how it's used in a sentence:

* Adjective: Describing a person or thing that is accountable or obligated.

* *Example:* She is a responsible employee.

* Noun: The state of being accountable or obligated.

* *Example:* They took responsibility for the mistake.

* Pronoun: Used as a substitute for a noun phrase, usually in the phrase "the responsible."

* *Example:* The responsible should be held accountable.

So, it depends on the context!