thunderbolt
noun uk/ˈθʌn.də.bəʊlt/ us/ˈθʌn.dɚ.boʊlt/
(THUNDER)
[ C ]雷电，霹雳
a flash of lightning and the sound of thunder together
(SURPRISE/SHOCK)
[ S ]晴天霹雳；出人意料的突发事件；令人震惊的情况
an announcement, event, or idea that is completely unexpected or shocking
The news of the layoffs was a thunderbolt that left us all reeling. 裁员的消息对于我们犹如晴天霹雳。