duty-bound

adj [pred 作表语] obliged by duty 义不容辞: I'm duty-bound to help him. 就我来说, 帮助他是责无旁贷的.

dust-sheet, dust-up, dustbin, duster, dustiness, dustman, dustpan, dusty, Dutch, Dutch auction, Dutch barn, Dutch cap, Dutch elm, Dutch oven, Dutchman, duteous, dutiable, dutiful, dutifully, duty, duty-free, duvet, DV, dwarf, dwell, dwell on, dweller, dwelling, dwindle, dye, dyed-in-the-wool, dyeing, dyer, dying, dyke, dynamic, dynamically, dynamics, dynamism, dynamite,