Is the word appeared an adjective?

No, "appeared" is not an adjective. It is the past tense of the verb "appear".

Here's why:

* Adjectives describe nouns. They tell us what kind, how many, or which one.

* Verbs show action or a state of being. "Appeared" describes the action of becoming visible or coming into existence.

Example:

* Adjective: The *bright* star appeared in the sky. (Bright describes the star)

* Verb: The star *appeared* in the sky. (*Appeared* shows the action of the star)