Albert Barnes Commentary 2 Kings 3:25

"And they beat down the cities; and on every good piece of land they cast every man his stone, and filled it; and they stopped all the fountains of water, and felled all the good trees, until in Kir-hareseth [only] they left the stones thereof; howbeit the slingers went about it, and smote it." — 2 Kings 3:25 (ASV)

Kir-Haraseth, also known as Kir-Hareseth, is almost certainly identified with the modern city of Kerak, a fortified city on the highland just east of the southern part of the Dead Sea. It was the great fortress of Moab, though its capital was Rabbath or Rabbah. It was an important stronghold during the Crusades and remains a place of great strength today. The name "Kir" seems to have meant "fortress," and this root appears in other place names like Circesium and Carchemish.

Kir-Haraseth resisted all attempts to dismantle it. However, slingers found positions on the surrounding hills from which they could hurl stones into the city to harass the garrison, even though they were unable to capture the town.