Noun. From Georgian.
“The day after tomorrow”
Despite this being a fantastic word which would be very useful in English, I can’t help but think that the film of the same name would be worse if it was just called Zeg.
As a point of grammatical interest, this website states that the word is an adverb but it seems to function well as a noun (or perhaps adjective?) in English. Plus, it shows how the word is written in Georgian script, too!