单词	cack-handed
释义	cack-handedcack-hand‧ed /ˌkæk ˈhændɪd◂/ adjective British English informal Word Origin WORD ORIGINcack-handed Origin: 1800-1900 Perhaps from Old Norse keikr ‘bent backwards’ careless and tending to drop things, or badly done SYN  clumsy
随便看	ultimatum ultra- Ultrabook ultramarine ultraportable ultrasonic ultrasound ultraviolet ululate ululation Uluru Ulysses um umami um and ah umber umbilical cord umbrage umbrella UMIST umlaut ump umpire umpteen umpteenth

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