blitz·krieg 
(bl
ĭts
kr
ēg
′)
n. A swift, sudden military offensive, usually by combined air and mobile land forces.
[German : Blitz, lightning (from Middle High German blitze, from bliczen, to flash, from Old High German blekkazzen; see bhel-1 in the Appendix of Indo-European roots) + Krieg, war (from Middle High German kriec, from Old High German krēg, stubbornness; see gwerə-1 in the Appendix of Indo-European roots).]