ra.zah describes becoming depleted: Jacob's flesh starves and the land's gods waste away.

The attested use describes becoming depleted or wasting away: Isaiah 17:4 places it with the wasting of Jacob's bodily fatness, while Zephaniah 2:11 applies it to the gods of the land.

1. becoming depleted or wasted away · dominant

   In Isaiah 17:4, the Niphal imperfect form occurs in the clause about the fatness of Jacob's flesh; the APB renders the clause, “and the fatness of his flesh will starve.” In Zephaniah 2:11, the Qal perfect form concerns all the gods of the land, and the APB renders that they will “waste away.”

   Isaiah 17:4Zephaniah 2:11

In the Anselm Project Bible: The APB presents bodily depletion in Isaiah 17:4 with “will starve” and the fate of the gods in Zephaniah 2:11 with “waste away.” These renderings show the clauses' presentation rather than a fixed English equivalent.