Is don't a noun or verb?

Answer 1

The word "don't" is a contraction of "do not". The "do" part of the contraction is an active verb, but the "not" part is a highly significant adverb. If the contraction must be assigned a part of speech, it probably is considered an active verb.

Answer 2

No, the word don't is a contraction, a combination of the verb 'do' and the adverb 'not'. The contraction don't function in a sentence as the verb (or auxiliary verb). Example:

We do not carry that brand. OR: We don't carry that brand.

Answer 3

It is most commonly a verb.

However, it can also be used as a noun. It is a noun when talking about a "list of don'ts", for example. i.e. a list of things that are forbidden.