to hate bitterly, drought, dry
癉 centers on intense, withering negativity: a bitter hatred that feels as parching as drought, or a state of dryness and exhaustion.
癉 combines 疒 (sickness) with 單, which likely contributes the sound and may relate to the idea of exhaustion or bitterness. The exact historical development is uncertain.
The sickness enclosure 疒 wraps around 單, a shape that suggests something solitary and exposed. Picture a person sick with bitter hatred, left alone under a scorching sun that dries everything up.
For タン, imagine a tongue dried out by drought and bitter hatred: tongue -> タン, and the parched feeling matches the kanji's core idea.