Origin

This character combines the body part classifier 月 (which represents flesh or the body) on the left with 重 (meaning heavy or weighty) on the right. The idea is that when swelling or a tumor develops, that part of the body becomes heavy and distended — visibly thicker and more substantial than normal. By pairing the flesh radical with the concept of heaviness, the character captures the physical sensation and appearance of a swollen or diseased area of the body.