Literally meaning: “suppuration, pus production”
Origin: Anc Greek
εν-/en (= prefix meaning “in”, “into” or “cause to be”)
+πύον/pyon(=pus) > πύθω/pytho(=rot, stink)
Empyema is the accumulation of pus and fluid in a body cavity, especially the pleural cavity (around the lungs) mainly because of pneumonia.