你可以用 "not attractive" 或者 "unattractive" 来形容某物不漂亮。这两个词都是从拉丁文 "attractivus" 衍生而来，意思是有吸引力的。所以，当你用 "not attractive" 或者 "unattractive" 来形容某物的时候，就是在说这个东西没有吸引力。

下面是几个例句：

The dress was not attractive, so I didn't buy it. (这件裙子不漂亮，所以我没买。)
He has an unattractive personapty and no one wants to be around him. (他的个性不好看，没人愿意跟他在一起。)
The old house was quite unattractive, but we bought it because of its location. (这幢旧房子非常不好看，但是我们因为它的位置而买了它。)