- Full of unpropitious stellar influences; unpropitious;
ill-boding. - Attended with suffering or disaster; very unfortunate;
calamitous; ill-fated; as, a disastrous day; a disastrous termination
of an undertaking.
Meaning of 'disastrous' (Princeton's WordNet)
1 . disastrous
[ s]
Meaning (1): - (of events) having extremely unfortunate or dire consequences; bringing ruin
Example in sentence:
a calamitous defeat;
a fateful error;
it is fatal to enter any war without the will to win it;
such doctrines, if true, would be absolutely fatal to my theory;
the battle was a disastrous end to a disastrous campaign;