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eager implies great enthusiasm, zeal, or sometimes impatience, in the desire for a pursuit of something eager to begin work: avid suggests an intense, sometimes greedy, desire to enjoy or possess something avid for power; keen implies deep interest and a spirited readiness to achieve something the team was keen on winning; anxious suggests eagerness, but with some uneasiness over the outcome anxious to excel
See eager in Webster's New World Roget's A-Z Thesaurus II
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