unprepossessing       
adjective uk/ˌʌn.priː.pəˈzes.ɪŋ/ us/ˌʌn.priː.pəˈzes.ɪŋ/
 无趣的,乏味的;没有吸引力的
not interesting, attractive, or impressive
  We were disappointed at the unprepossessing exterior of the hotel. 我们对旅馆乏味的外表感到失望。 
 Synonyms: ghastly grim (UNPLEASANT) grotesque (UGLY)hideousugly (NOT ATTRACTIVE)unattractiveunsightly