Rabshakeh: or, "political officer". Probably. renegade Jew.
Lachish. Now Tell el Hesy, or Umm Lakis. See the work on the excavations there, published by the "Palestine Exploration Fund". Compare note on 2 Kings 18:17, and 2 Kings 19:8.
with. great army. Foretold in Isaiah 29:1-6, as foretold in Isa 22:15-26.
he stood. In the same spot where Isaiah stood with Ahaz twenty-eight years before. See Isaiah 7:3.
highway. See note on Isaiah 7:3.