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

• prosody
• prospect
• prospective
• prospector
• prospectus
• prosper
• prosperity
• prosperous
• prostate
• prostatitis
• prosthesis
• prosthetics
• prostitute
• prostrate
• prostration
• prot-
• protactinium
• protagonist
• protea
• protean
• protease
• protect
• protection
• protectionism
• protectorate