What is when translated from English to Greek?

The translation of "what" in Greek depends on its grammatical function in the sentence. There isn't one single equivalent. Here are a few possibilities:

* Τι (ti): This is the most common translation and is used as an interrogative pronoun meaning "what?" It's used when asking about the nature or identity of something. Example: Τι είναι αυτό; (Ti ine afto?) - What is this?

* Ποιο (poio), Ποια (poia), Ποια (poia): These are interrogative pronouns meaning "which?" or "what?" They are used when asking about a specific item from a set of possibilities. The form changes depending on gender and number (masculine singular, feminine singular, neuter singular and plural forms exist). Example: Ποιο βιβλίο διάβασες; (Poio vivlio diabases?) - Which book did you read?

* Πώς (pos): This translates to "how?" but can sometimes be used in the sense of "what?" when asking about a manner or method. Example: Πώς το έκανες; (Pos to ekanes?) - What did you do it with? / How did you do it?

To accurately translate "what," you need to provide the entire sentence in English.