sharpen

1. V-T/V-I If your senses, understanding, or skills sharpen or are sharpened, you become better at noticing things, thinking, or doing something. 使敏銳; 增強(qiáng)

Her gaze sharpened, as if she had seen something unusual. 她眼睛一亮，好像看到了不尋常的東西。

He will need to sharpen his diplomatic skills in order to work with Congress. 他將需要增強(qiáng)外交技巧以與國會(huì)打交道。

2. V-T If you sharpen an object, you make its edge very thin or you make its end pointed. 使變鋒利; 弄尖

He started to sharpen his knife. 他開始磨刀。