Therefore shall Moab howl for Moab, every one shall howl: for the foundations of Kirhareseth shall ye mourn; surely they are stricken.
Therefore shall Moab howl - all hope of being allowed shelter by the Jews being cut off.
For the foundations of Kir-hareseth - i:e., ruins; because, when houses are pulled down, the "foundations" alone are left (Isaiah 58:12). Jeremiah, in the parallel place (Jeremiah 48:31), renders it "the men of Kir-heres." Men are the moral foundations or stay of a city.
Kir-hareseth - literally, a citadel of brick.
Surely (they are) stricken - rather, joined with "mourn," 'ye shall mourn, utterly stricken' х 'ak (H389), only, nothing but, utterly] (Maurer).