scummy

The pond water looked scummy after the heavy rain washed in dirt and leaves.

用法提示：scummy 是形容词，表示“满是浮渣的”，这里描述池塘水面被脏东西覆盖的状态。

This scummier corner of the lake is full of green algae.

用法提示：scummier 是 scummy 的比较级，表示“更有浮渣的”，用来比较湖中不同区域的脏污程度。

The pool filter removed the scummiest layer of oil and dust from the surface.

用法提示：scummiest 是 scummy 的最高级，表示“浮渣最多的”，强调过滤掉的那层浮渣程度最深。