fate·ful 
/ˈfeɪtfəl/ adjective
/ˈfeɪtfəl/ adjective : having important results
▪ She made the fateful [=momentous] decision to go back home to face her mother. ▪ His life changed on that fateful November evening. : producing a serious and usually bad result ▪ Hundreds perished on that fateful day. ▪ Her campaign took a fateful turn.
▪ She made the fateful [=momentous] decision to go back home to face her mother. ▪ His life changed on that fateful November evening. : producing a serious and usually bad result ▪ Hundreds perished on that fateful day. ▪ Her campaign took a fateful turn.
— fate·ful·ly adverb
