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sharpen verb

  /ˈʃɑɹpən/ , /ˈʃɑːpən/
  • (transitive, sometimes, figurative) To make sharp.
 afilar, aguzar

sharpener noun

  /ˈʃɑː(ɹ)pənə(ɹ)/
  • A device for making things sharp.
 sacapuntas

sharpener;

afilador
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