[Burn: To consume with fire, to reduce to ashes by the action of heat or fire. To burn up: to consume entirely by fire. - Web.]
NOTE. - The wicked are compared to the most combustible and destructible materials, as chaff [Matt.3:12], stubble [Mal.4:1] tares [Matt.13:40], branches [John 15:6], thistle-down [Isa.17:13, margin]; which would be utterly subversive of the idea of unending life in a consuming fire."
Uriah Smith