ㄨㄟˊwéiㄉㄜˊㄅㄨˋㄗㄨˊ

  1. 好事沒有做到史記··淮陰侯》:下鄉南昌亭長小人為德不卒。』」·東郭·》:一會人兒兩截前番恭敬虛竭悠悠悠悠可也為德不卒豪奢。」

to start on virtue but give up (idiom)​; to fail to carry things through, lack of sticking power, short attention span