What part of speech is baby?

"Baby" can be a few different parts of speech, depending on how it's used in a sentence:

* Noun: This is the most common usage, referring to a very young child.

* Example: "The baby is sleeping soundly."

* Adjective: Can describe something as small, immature, or simple.

* Example: "He took a baby step towards his goal."

* Interjection: Can be used to express affection, surprise, or concern.

* Example: "Oh, baby, you're so cute!"

It's important to consider the context of the sentence to determine the correct part of speech for "baby".