thunderbolt
🇺🇸
/ˈθʌndərbəʊlt/
🇬🇧
/ˈθʌndəbəʊlt/
A sudden flash of light in the sky during a storm, usually followed by the sound of thunder.
The sudden thunderbolt illuminated the dark sky.
突然の落雷が暗い空を照らした。