Therefore thus says Yahweh, the God of hosts, the Lord: "Wailing will be in all the broad ways; And they will say in all the streets, 'Alas! Alas!' And they will call the farmer to mourning, And those who are skillful in lamentation to wailing.
Now that is a term that is one of just total despair. You say, "Alas, alas," that means, "We've had it." That's just total despair. We don't use that term anymore, but it's one that just signifies, really, the end of the world.