日にっ射しゃ病びょう

noun

heatstroke; sunstroke

Medical condition caused by prolonged exposure to strong sunlight or high heat. In modern usage, 熱中症 is more common as a general term for heat-related illness, while 日射病 specifically refers to sun-induced heatstroke.

• 炎えん天てん下かで作さ業ぎょうをしていたら日にっ射しゃ病びょうになってしまった。

  I got heatstroke from working under the blazing sun.