病bìng

Modern simplified form (簡體). 病 (bìng, "illness, disease") is built from the radical 疒 (sickness) alongside 丙, the third of the heavenly stems, which historically served as a phonetic element. The character vividly conveys the notion of a person lying ill under a medical roof, and it functions as a radical in numerous health‑related characters such as 疾 (illness), 痛 (pain), and 痒 (itch), underscoring its central role in the vocabulary of disease.