Here's why:
* Nouns name people, places, things, or ideas. "Hi" doesn't refer to any of those.
* Adjectives describe nouns. "Hi" doesn't describe anything.
It's a word we use to start a conversation or acknowledge someone.
Here's why:
* Nouns name people, places, things, or ideas. "Hi" doesn't refer to any of those.
* Adjectives describe nouns. "Hi" doesn't describe anything.
It's a word we use to start a conversation or acknowledge someone.