demon /'di: man; 'diman/ n evil, wicked or cruel supernatural being or spirit; (colloq) fierce or energetic person: 惡魔; 魔鬼; (俗)兇惡的或精力充沛的人： a ~ bowler, (cricket) very fast bowler. (板球)兇信的投手。 He's a — for work, (colloq) works with great energy. (俗)他做起事來(lái)精力過(guò)人。 ~ic /di: 'monik; di'manik/ adj