* Πήγαινε (Pigaine): This is the singular imperative form of the verb "to go" (πήγαινω - pigaínō), meaning "go!" (said to one person).
* Πηγαίνετε (Pigainete): This is the plural imperative form of "to go," meaning "go!" (said to multiple people).
* πάρε (pare): This means "take" but is often used informally as "go get" or "go and get" (e.g., "πάρε το βιβλίο" - "pare to vivlio" - "go get the book").
The best choice depends on the situation and who you're talking to. For a general "go," πήγαινε (Pigaine) or Πηγαίνετε (Pigainete) are appropriate.