U 开头单词
unsuccessfulness n.不成功；失败
unsuccessfully adv.失败地；无用
unsuccessful party [法学]败诉方
unsuccessful adj.不成功的；失败的
unsuccess n.不成功；失败；无结果；徒劳
unsubtractedness n.无减除
unsubtle adj.不细致的；不敏锐的；不灵巧的
unsubstituted adj.未被取代的
unsubstantiated adj.未经证实的，没有事实根据的
unsubstantially adj.不实在的；脆弱的；缺乏事实根据的
unsubstantialize v.非物质化；无形化=unsubstantialise（英）.
unsubstantiality n.不坚固(没有实质)
unsubstantialise v.无形化；非物质化=unsubstantialize(美).
unsubstantial adj.不实在的；脆弱的；缺乏事实根据的
unsubsidized adj.没有补助的；不受津贴的