fatally
01
致命的に
in a way that is capable of causing death
02
致命的に, 悲惨な結果をもたらすように
in a way that results in an absolute failure or disaster
例
The ship 's navigation system malfunctioned, contributing fatally to its collision with an iceberg.
船の航行システムが故障し、氷山との衝突に致命的に寄与した。
