polypus
瘜 refers to a polypus, an abnormal tissue growth. The meaning is specific and medical, with no broader conceptual cluster.
瘜 combines the sickness radical 疒 with 息, which likely provides the sound. The character is a phono-semantic compound for a medical condition.
The sickness enclosure 疒 surrounds 息 (breath). Imagine a growth that makes breathing difficult, like a polypus obstructing the airway.
For ショク, picture a doctor saying 'Shock!' upon finding a polypus during an exam: shock -> ショク, and the growth is inside the sickness enclosure.
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