使（计划或希望）破灭；使受挫，使失败
to cause someone or something, usually a plan or hope, to fail or to be affected very badly
The latest trade figures have dealt a severe blow to hopes of an early economic recovery. 最新的贸易数据彻底粉碎了经济早日复苏的希望。
The airline industry's difficulties have dealt a heavy blow to already struggling airports in the region.
Extreme weather conditions have dealt a serious blow to agriculture across the state.
The scandal threatens to deal a fatal blow to the politician's once promising career.
Another lockdown would surely have dealt the industry a blow from which it couldn't recover.
See also: deal verb (SHARE OUT)