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  1. sharpen

    • IPA[ˈSHärpən]

    美式

    • v.
      make or become sharp or sharper;improve or cause to improve
    • verb: sharpen, 3rd person present: sharpens, gerund or present participle: sharpening, past tense: sharpened, past participle: sharpened

    • 釋義

    動詞

    • 更多解釋
    • IPA[ˈʃɑːp(ə)n]

    英式

    • v.
      make or become sharp or sharper: she sharpened her pencil her tone sharpened

    Oxford Dictionary

  2. 知識+