katto
An abrupt, intense burst of light or heat. Also describes a sudden flare of anger — eyes blazing or face flushing red in an instant. Emphasizes the explosive, instantaneous nature.
💡Stepping outside on a scorching day — 'The moment I opened the door, the sunlight hit me katto.'
太陽がかっと照りつけた。
The sun blazed down katto.
He opened his eyes ___ wide with anger when he heard the news.
そのニュースを聞いて、彼は○○目を見開いた。