stay clam and not panic

[Unregistered]

In an emergency, it is especially important to stay calm and not panic. Otherwise the result will be disastrous.

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The sentence above is from a book which one of my students has.
The student asked me if the word 'PANIC' was used as an adjective,
or as a noun, or as a verb.
At that time, I said that it was used as a noun, and that the word
is not used as an adjective.
But, now, the more I look at the sentence, the more confused I get.
I know it is used as a phrase to tell people to stay cool or something
like that, especially in an emergency situation. I'm not sure, however,
whether it is a noun or a verb.
If you say, "You should stay calm, not panic.", 'Panic' is a verb in this
case, right? On the other hand, I think it could be used as a complement
after the verb, 'stay'.
Is there anyone who can help me out for this question?

[M56]

In an emergency, it is especially important to stay calm and not panic. Otherwise the result will be disastrous.

------------------------------------
The sentence above is from a book which one of my students has.
The student asked me if the word 'PANIC' was used as an adjective,
or as a noun, or as a verb.
At that time, I said that it was used as a noun, and that the word
is not used as an adjective.
But, now, the more I look at the sentence, the more confused I get.
I know it is used as a phrase to tell people to stay cool or something
like that, especially in an emergency situation. I'm not sure, however,
whether it is a noun or a verb.
If you say, "You should stay calm, not panic.", 'Panic' is a verb in this
case, right? On the other hand, I think it could be used as a complement
after the verb, 'stay'.
Is there anyone who can help me out for this question?

It can be used as either:


Don't panic! (verb:the action "to panic")

Don't get into a panic. (noun)

Don't become panicked. (adjective, or passive verb)
Don't become panicked by him. (passive verb)