V-ERG
(感覺、理解)加強;(使)加深;(技巧)提高;(使)改善
If your senses, understanding, or skills sharpen or are sharpened, you become better at noticing things, thinking, or doing something.
例句
Her gaze sharpened, as if she had seen something unusual...
她眼睛一亮，仿佛看見了什么不尋常的事情。
You can sharpen your skills with rehearsal.
排練可以讓技巧更加純熟。