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keen adjective

  /kin/ , /kiːn/
  • (chiefly, Commonwealth) Often with a prepositional phrase, or with to and an infinitive: showing a quick and ardent responsiveness or willingness; eager, enthusiastic, interested.
 desideroso, disposto, entusiasta, incline, intenzionato, preparato
  • Fierce, intense, vehement.
 veemente

keenness

fanatismo
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