quixotic
adjective/kwɪkˈsɒtɪk/
/kwɪkˈsɑːtɪk/
(formal)- having or involving ideas or plans that show imagination but are usually not practicalWord OriginFrom the character Don Quixote in the novel by Miguel de Cervantes, whose adventures are a result of him trying to achieve or obtain things that are impossible.
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quixotic