dutiful：尽职尽责的；恭敬的，孝顺的

词根词缀：duty(y→i)责任 + -ful形容词词尾,充满

• negotiable
• negotiate
• negotiation
• negotitate
• Negress
• negritude
• Negro
• negroid
• negroidal
• Negrophile
• Negro spiritual
• neigh
• neighbor
• neighborhood
• neighborhood watch
• neighbour
• neither
• nelson
• nematode
• nemesis
• neo-
• neoclassical
• neocolonialism
• neocortex
• neodymium