* Verb (present participle): This is the most common usage, describing the act of becoming awake.
* Example: "The sun is waking the birds."
* Adjective: This is less common, describing something that is related to waking up.
* Example: "The waking hours are the best time to work."
* Noun: This is even rarer, but it can be used to refer to the act of waking up.
* Example: "The alarm clock startled him from his waking."
So, the specific part of speech depends on the context of the sentence!