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.
例句
We found the tastiest and most imaginative paella and tapas in the most unprepossessing bars and cafés.我们在最不起眼的酒吧和咖啡馆找到了最可口、最具创意的肉菜饭和餐前小吃。
英英词典释义
Adjective
1. creating an unfavorable or neutral first impression