What part of speech is the word either?

The word "either" can be a few different parts of speech, depending on its use in a sentence:

* Conjunction: When "either" connects two options or choices, it is a conjunction.

* Example: "You can have either apple pie or chocolate cake."

* Adverb: When "either" modifies a verb, adjective, or another adverb, it is an adverb.

* Example: "I don't like either of those movies." (modifies the verb "like")

* Pronoun: When "either" refers to one of two things previously mentioned, it is a pronoun.

* Example: "We have two options. Either will work."

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