What is to?

To

"To" is a versatile word in the English language that primarily functions as a preposition and an infinitive marker.

• As a Preposition: "To" typically indicates direction, purpose, relationship, or limit. It can show movement or destination (e.g., "I'm going to the store"), indicate a recipient (e.g., "Give it to me"), specify a time or limit (e.g., "From Monday to Friday"), or denote a relationship (e.g., "He's married to her").

• As an Infinitive Marker: "To" precedes the base form of a verb to create an infinitive (e.g., "I want to eat"). Infinitives can function as nouns, adjectives, or adverbs within a sentence.

Understanding the context is key to correctly interpreting the function of "to" in a sentence. It is a core part of English grammar.