Our bones are dried - (Psa 141:7), explained by “our hope is lost” (Isa 49:14); our national state is as hopeless of resuscitation, as marrowless bones are of reanimation.
cut off for our parts - that is, so far as we are concerned. There is nothing in us to give hope, like a withered branch “cut off” from a tree, or a limb from the body.