Interjections are words or phrases that express strong emotion and are often followed by an exclamation point.
Here are some examples of how "aw" is used as an interjection:
* "Aw, that's so sweet!"
* "Aw, poor thing."
* "Aw, I wish I could go."
While "aw" is most commonly used as an interjection, it can also be used as a noun in informal contexts, meaning "an expression of tenderness or sadness." For example:
* "Let out an aw at the sight of the lost puppy."
However, this usage is less common and more informal.