* Adjective: This is the most common usage. It describes something as being fair, sensible, or moderate.
* Example: "It's a reasonable request."
* Noun: It can be used to refer to something that is fair or sensible.
* Example: "We need to find a reasonable solution."
* Adverb: Less common, but it can modify a verb, adjective, or another adverb, meaning "in a reasonable manner."
* Example: "She answered reasonably."
The specific part of speech will depend on the context of the sentence.