keenness

noun

thinness of edge or fineness of point
縁が薄いこと、または先端が細いこと
a quick and penetrating intelligence
素早く見抜く知性
- he argued with great acuteness
  彼はすばらしい鋭さで論争した
- I admired the keenness of his mind
  私は彼の心の熱心さを賞賛した
a positive feeling of wanting to push ahead with something
何かを押し進めたいと思う前向きな気持ち

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