For by fire
'esh (aysh)
fire -- burning, fiery, fire, flaming, hot.
and by his sword
chereb (kheh'-reb)
drought; also a cutting instrument (from its destructive effect), as a knife, sword, or other sharp implement -- axe, dagger, knife, mattock, sword, tool.
will the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
plead
shaphat (shaw-fat')
to judge, i.e. pronounce sentence (for or against); by implication, to vindicate or punish; by extenssion, to govern; passively, to litigate
with all flesh
basar (baw-sawr')
flesh (from its freshness); by extension, body, person; also (by euphem.) the pudenda of a man -- body, (fat, lean) flesh(-ed), kin, (man-)kind, + nakedness, self, skin.
and the slain
chalal (khaw-lawl')
pierced (especially to death); figuratively, polluted -- kill, profane, slain (man), slew, (deadly) wounded.
of the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
shall be many
rabab (raw-bab')
to cast together, i.e. increase, especially in number; also to multiply by the myriad -- increase, be many(-ifold), be more, multiply, ten thousands.