Is this a noun or verb?

Answer 1

The word 'this' is a demonstrative pronoun, an adjective (determiner), and an adverb. The word 'this' is not a noun or a verb.

A demonstrative pronoun represents a thing or things, relatively near or far in place or time. The demonstrative pronouns are: this, that, these, and those.

Example: This tastes better than that.

An adjective, when 'this' is followed by a noun, describes that noun.

Example: This cake tastes better than the recipe I tried.

An adverb modifies a verb or an adjective to the degree or extent that is suggested or indicated.

Example: It's been a long time since we had this good a time.

Answer 2

Without context, it is not possible to determine if the word is being used as a noun or a verb. The same word can function as either a noun or a verb depending on how it is used in a sentence.