loading能…有，有能力的beabletodosth.
enable使能够，(en-使动)enforce执行
enlarge扩大enrich丰富，使富有entitle给题名；赋予权力encourage鼓励discourageendure长期忍受，持续endurable(dur持续)during,durable,duration
忍受),tolerate(容忍)
ensure保证（使肯定）unable不能…的，没能力的
unfold展开，打开
unload卸载(unloadthetruck,unloadtheship)undo
unemployed,unemployment,employ=use,employer,employee(ee-受动者)
examinee,referee,interviewee
,不公正的，不正当的fairplay
unlike,unlikelyunforgettable
unsinkableunfortunately
unintelligible难理解的，难懂的unknown未知的，无名的，陌生的unnecessaryunquestionableunusual
(dis=away,not)使残疾，残疾人
Mysonisonlyabitontheslowside.Heisphysicallychallenged.
disorder混乱，失调
discover,uncover,recover,recovery,undiscovered,undiscoverabledisguise伪装
XXescapedbydisguisinghimselfasacivilian.