purulent

The nurse noticed a purulent discharge from the wound and cleaned it carefully.

用法提示：purulent 是形容词，修饰 discharge，表示“脓性的”。

If the sore becomes purulent, you should see a doctor instead of treating it at home.

用法提示：purulent 作表语形容词，说明 sore 的状态为“化脓的”。

The doctor described the fluid as purulent and ordered a lab test to identify the bacteria.

用法提示：purulent 作宾语补足语，意为“脓性的”，描述液体性质。