calamitous
-
(s) (of events) having extremely unfortunate or dire consequences; bringing ruin
- the stock market crashed on Black Friday
- a calamitous defeat
- the battle was a disastrous end to a disastrous campaign
- "such doctrines, if true, would be absolutely fatal to my theory"- Charles Darwin
- "it is fatal to enter any war without the will to win it"- Douglas MacArthur
- a fateful error