D defs.my
Entry 1 sense Webster, 1913

Deathblow

· Death·blow · IPA /ˈdɛθbləʊ/
01 n. A mortal or crushing blow; a stroke or event which kills or destroys.
  1. 1.
    A mortal or crushing blow; a stroke or event which kills or destroys.
    “The deathblow of my hope.” Byron.