What does Ezekiel 21:7 mean?

When they ask you, ‘Why are you groaning?’ tell them, ‘Because of the news that’s coming. Every heart will melt, every hand will hang limp, everyone will lose courage, and knees will turn to water. It’s coming, and it will happen.’ That’s what the Lord God says. Ezekiel 21:7 - Modern Text Bible

(Ezekiel’s visible sorrow is a sign of the terror and despair that will come when God’s judgment arrives.)