Adjective: fateful feyt-ful
- Having momentous consequences; of decisive importance
"that fateful meeting of the U.N. when … it declared war on North Korea";
- fatal
- Controlled or decreed by fate; predetermined
"a fateful series of events";
- fatal
- Ominously prophetic
"The fateful sky warned of an approaching storm";
- foreboding, portentous
- (of events) having extremely unfortunate or dire consequences; bringing ruin
"a fateful error";
- black, calamitous, disastrous, fatal
See also: decisive, inevitable, prophetic, prophetical, unfortunate