12 The peoples will be burned to ashes; like cut thornbushes they will be set ablaze.”

Read Isaiah 33:12 Using Other Translations

And the people shall be as the burnings of lime: as thorns cut up shall they be burned in the fire.
And the peoples will be as if burned to lime, like thorns cut down, that are burned in the fire."
Your people will be burned up completely, like thornbushes cut down and tossed in a fire.