/dɪˈzæs.trəs.li/
in a way that is disastrous (= extremely bad or unsuccessful): 极糟糕的；灾难性的；完全失败的
disastrous adjective
very bad, harmful or unsuccessful 极糟糕的；灾难性的；完全失败的 SYN catastrophic, devastating
a disastrous harvest/fire/result
严重歉收／火灾；灾难性的结果
Lowering interest rates could have disastrous consequences for the economy.
降低利率可能给经济带来灾难性后果。