dynamic

a.有生气的，能活动的，有力的；动力的

dutiable, dutiful, dutifully, duty, duty-bound, duty-free, duvet, DV, dwarf, dwell, dwell on, dweller, dwelling, dwindle, dye, dyed-in-the-wool, dyeing, dyer, dying, dyke, dynamically, dynamics, dynamism, dynamite, dynamo, dynastic, dynasty, dysentery, dyslexia, dyslexic, dyspepsia, dyspeptic, E, E number, E, e, E-mail, e. g., e.g., ea, each,