1.
Something that is ~ involves or causes a sudden terrible disaster.
A tidal wave caused by the earthquake hit the coast causing ~ damage...
The water shortage in this country is potentially ~...
= disastrous
ADJ
~ally
The faulty left-hand engine failed ~ally as the aircraft approached the airport.
ADV: usu ADV after v, also ADV adj/-ed/adv
2.
If you describe something as ~, you mean that it is very bad or unsuccessful.
...another ~ attempt to arrest control from a rival Christian militia...
His mother’s untimely death had a ~ effect on him.
= disastrous
ADJ
~ally
By the time we had to sell, prices had fallen ~ally.
ADV: usu ADV after v