outsider

n. 外行(旁观者,没有关系的人)

Although she's lived there for ten years, the villagers still treat her as an outsider.

她虽然在那儿住了十年, 村里人仍视她如外人.

That horse is a complete outsider; I wouldn't waste your money on it.

那匹马绝无获胜可能, 我要是你可不把钱压在它身上.