What part of speech is the word to in following sentence Jack and Jill went up hill fetch a pail water?

In the sentence "Jack and Jill went up the hill to fetch a pail of water," the word "to" is a preposition.

Here's why:

* Prepositions show the relationship between a noun or pronoun and another word in the sentence.

* In this case, "to" connects the verb "went" to the phrase "fetch a pail of water," indicating the purpose of their journey.

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