1. 動詞
   不及物動詞:
   變尖, 變鋒利
   磨礪
   變得敏銳
   急劇化, 尖銳化
   (聲音等)變尖銳
   (能力、技能、形象等)改善, 改進|提高
   及物動詞:
   使...(物)變尖
   使...(物)鋒利
   

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   同義字詞
   edge,grind,hone,strop,whet
   

例句

1. That might sharpen your axe.
2. You can always sharpen your skills.
3. I haven't. gonna sharpen my pencils.
4. His motto was, " sharpen your bayonet".
5. Close the door, and sharpen your pencil.
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