1
sharpen + noun
及物动词，后接具体物体。
She sharpened the pencil with a small knife.
她用一把小刀削尖了铅笔。
使变锋利；变锋利
sharpened — past of sharpen
先理解核心含义，再看它在真实句子里的用法。
使变锋利；变锋利
make or become sharp or sharper
She sharpened the pencil with a small knife.
她用一把小刀削尖了铅笔。
使锋利
To make sharp.
变锋利。
To become sharp.
sharpen
Base
原形
sharpens
3rd person
第三人称单数
sharpening
-ing
现在分词
sharpened
Past
过去式
sharpened
Past participle
过去分词
I sharpen the knife every morning.
我每天早上磨刀。
He used a whetstone to sharpen the kitchen knife before cutting the vegetables.
他在切菜前用磨刀石把菜刀磨锋利。
Reading challenging books can help sharpen your critical thinking skills.
阅读有挑战性的书籍有助于提高你的批判性思维能力。
You can use photo editing software to sharpen the blurry image.
你可以用照片编辑软件来锐化这张模糊的图片。
及物动词，后接具体物体。
She sharpened the pencil with a small knife.
她用一把小刀削尖了铅笔。
表示使用工具或方法。
You can sharpen a knife with a whetstone.
你可以用磨刀石磨刀。
比喻用法，指提高能力或使更敏锐。
Reading can sharpen your mind.
阅读能使思维敏捷。
Not this
I need to sharp my pencil.
Use this
I need to sharpen my pencil.
错误：将形容词“sharp”误用作动词。英语中表示“使锋利”的正确动词是“sharpen”，需加后缀-en。应使用“sharpen”作谓语。
Not this
He sharpened on the stone.
Use this
He sharpened the knife on the stone.
错误：及物动词“sharpen”缺少直接宾语。后面必须跟被磨尖的对象（如“the knife”），否则句子不完整。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
磨刀
He sharpened the knife before cutting the meat.
他在切肉前磨了刀。
削铅笔
She sharpened her pencil with a small sharpener.
她用一个小卷笔刀削了铅笔。
磨炼技能
The workshop helped sharpen their writing skills.
这个工作坊帮助磨炼了他们的写作技能。
集中注意力
Meditation can help sharpen your focus.
冥想有助于集中你的注意力。
锐化图像
You can sharpen the image using photo editing software.
你可以用照片编辑软件锐化图像。
加剧争论
New evidence sharpened the debate over climate change.
新证据加剧了关于气候变化的争论。
磨利爪子，准备攻击或竞争
The competitors are sharpening their claws for the final round.
竞争对手们正在磨利爪子，准备最后一轮比赛。
准备好计算或工作，认真对待
You'd better sharpen your pencil because the boss wants exact numbers.
你最好准备好，因为老板要精确的数字。
磨刀不误砍柴工，提升自我
He takes time each week to sharpen the saw by learning new skills.
他每周都花时间通过学新技能来自我提升。
斧头若钝，不先磨利，必费更多力气；但智慧能助人成功。
From Ecclesiastes 10:10, Bible.
出自圣经传道书10:10。
你需要磨炼你的技能，阿宝。
Master Shifu to Po in Kung Fu Panda (2008).
《功夫熊猫》（2008）中师父对阿宝说。
Use sharpened naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“sharp”（锋利）+“-en”（使...），即“使锋利”。想象削铅笔时，笔尖变尖的过程。
动词，中性语域，常用于日常（如磨刀、削铅笔）和技术（如提高技能、清晰图像）场景，具体或抽象均可。
These words share the spelling ending '-en' but the stressed vowel differs; exact rhymes are rare.
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.