Bible language trivia question.?

Almost every word in the Bible was written in either Hebrew or Greek. There are a few Aramaic words scattered here and there in the New Testament. And I suppose a few words referring to Roman officials or to the Roman Empire can be taken to be Latin words.

There is one word in the New Testament that is not from any of these languages. It occurs in a verse that is quoted fairly often. What word is it? And from what language? (In case there are examples other than the one I am thinking of, I am referring to a word whose meaning is expounded in the Biblical commentaries of St. Augustine.)

Hint: In many English-language Bibles today, the word remains untranslated. I suppose the reasoning goes: "If the word would have struck a Greek speaker in New Testament times as a foreign word, then a faithful rendering into English should leave the word as a foreign sounding word."