Decisively important (7)
I believe the answer is:
fateful
(Other definitions for fateful that I've seen before include "Ominous" , "critical" , "Portentous; bringing death" , "Dire in its implications" , "Prophetic - portentous" .)
I believe the answer is:
fateful
(Other definitions for fateful that I've seen before include "Ominous" , "critical" , "Portentous; bringing death" , "Dire in its implications" , "Prophetic - portentous" .)