heatstroke, sunstroke
癨 centers on illness caused by extreme heat: heatstroke or sunstroke. It describes the body's reaction to overwhelming sun or heat exposure.
癨 combines 疒 (sickness) with 霍, which likely contributes the sound and may relate to sudden or violent weather, fitting the idea of heatstroke as a sudden illness from the sun.
The sickness enclosure 疒 surrounds 霍, which contains 雨 (rain) and 隹 (bird). Imagine a bird caught in blazing sun without rain, falling ill from heatstroke.
For カク, picture a person with heatstroke desperately needing a cool cackle of ice water: cackle -> カク, and the cold drink cures the heat sickness.
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