提高( sharpen的过去式和过去分词 )；变得尖锐；变得更好；变得锋利；

1. 尖锐的：sharp-witted /机敏的/ | sharpened /尖锐的/ | sharpener /研磨者/削的人/研磨工具/

2. sharpened是什么意思

2. 磨尖：3) opened 打开 | 4) sharpened 磨尖 | 5) turned on 扭开

1. made sharp or sharper

    e.g. a sharpened knife cuts more cleanly

2. having the point made sharp

    e.g. a sharpened pencil