(Greek: ulcer, sore)

(Latin: sore, sore spot, painful spot)

(Greek > Latin: dragon; a kind of serpent; snake; a kind of fish; by extension, a festering sore)

(Greek: an eating, or gnawing, sore ending in mortification, necrosis, or the death of bodily tissue; usually the result of ischemia or the loss of blood supply to the affected area, bacterial invasion, and subsequent putrefaction)

(Greek: fluid [distinct from blood] that flows through the veins of the gods; by extension, "watery part of blood or milk," used in the sense of "thin, serous or sanious fluid, especially from a wound or sore")