fatally

adverb3

1. •
   In a deadly manner; lethally.

   • Witness our too much memorable shame When Cressy battle fatally was struck, And all our princes captiv'd by the hand Of that black name, Edward, Black Prince of Wales — 1599
2. •
   Ultimately, with finality or irrevocability, moving towards the demise of something.

   • Chelsea will point to that victory margin as confirmation of their superiority - but Spurs will complain their hopes of turning the game around were damaged fatally by Atkinson's decision. — 2012
3. •
   Fatedly; according to the dictates of fate or doom.