fatally
adv.in a way that causes death or leads to total failure.
adv.in a manner that results in death or leads to a disastrous, irreversible conclusion. Often modifies verbs related to injury or nouns describing flaws in a plan.
“The driver was fatally injured in the crash.”
“The project was fatally flawed from the start because the team ignored the budget limits.”
“While the initial error seemed minor, it proved fatally damaging to the company's reputation once the internal documents were leaked to the press.”
Commonly used with the past participle 'injured' or 'wounded' in news reports; also used figuratively with 'flawed' or 'weakened'.
Usage fatally politicized
“Lawyers for Linda Kitchen say her husband was "fatally injured" after the flight dropped 6,000 ft.”
“The boy shot and killed a schoolmate at a junior high school before fatally turning the gun on himself, the mayor of Zamboanga City said.”
From fatal + -ly.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.