unprepossessing /ˌʌnpriːpəˈzɛsɪŋ/

• 1. 

  ADJ If you describe someone or something as unprepossessing, you mean that they look rather plain or ordinary, although they may have good or special qualities that are hidden. 其貌不扬的 [正式]

  例：

  We found the tastiest tapas in the most unprepossessing bars.

  我们在最其貌不扬的酒吧找到了最好吃的西班牙餐前小吃。