炎症
yán zhèng · HSK 7
inflammation
🔥 炎 = two 火 fire stacked (flame) + 症 = ailment, so a fiery, hot ailment
炎 doubles the fire radical 火 to mean flame or blazing heat; 症 means symptom or ailment. Inflammation is literally the body running hot and red, the fire-ailment. The pronunciation yán zhèng echoes 炎 yán meaning flame.