fatally

Etymology

From fatal + -ly.

adv

1. In a fatal 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, William Shakespeare, The Life of King Henry V
   He told Peace that he did not believe his statement that he had fired the pistol merely to frighten the constable; had not Robinson guarded his head with his arm he would have been wounded fatally, and Peace condemned to death. 1918, H. B. Irving, A Book of Remarkable Criminals
   A 22-year-old man has been jailed for life with a minimum term of 25 years for fatally stabbing 22-year-old Tashan Daniel in an unprovoked attack at Hillingdon Underground station on September 24 2019. September 9 2020, “Network News: Man jailed for Hillingdon murder”, in Rail, page 25
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. April 15, 2012, Phil McNulty, “Tottenham 1-5 Chelsea”, in BBC
   "They pretend," as I hear, "that the verses of Kabir have four different senses; illusion, spirit, intellect, and the exoteric doctrine of the Vedas;" but in this part of the world it is considered a ground for complaint if a man's writings admit of more than one interpretation. While England endeavors to cure the potato-rot, will not any endeavor to cure the brain-rot, which prevails so much more widely and fatally? 1854, Henry David Thoreau, Walden, or Life in the Woods
3. Fatedly; according to the dictates of fate or doom.