What is the Greek word for welcome?

There isn't one single perfect translation for "welcome" in Greek, as the best word depends on the context. However, here are a few options:

* Καλώς ήλθατε (Kalos ilthate): This is the most common and formal way to say "welcome" in plural. It literally translates to "well you came."

* Καλώς όρισες (Kalos orises): This is the singular, informal version of the above. It's used when welcoming a single person.

* Καλώς ήρθες (Kalos irthes): This is a more archaic or poetic version of "Kalos orises," also singular and informal.

The best choice depends on the situation. For most situations, Καλώς ήλθατε (Kalos ilthate) or Καλώς όρισες (Kalos orises) will suffice.