sharpens , sharpening , sharpened
If your senses, understanding, or skills sharpen or are sharpened, you become better at noticing things, thinking, or doing something.
Her gaze sharpened, as if she had seen something unusual.
她眼睛一亮,好像看到了不寻常的东西。
He will need to sharpen his diplomatic skills in order to work with Congress.
他需要提高外交能力来与国会共事。
If you sharpen an object, you make its edge very thin or you make its end pointed.
He started to sharpen his knife.
他开始磨刀。