Quixotic

прилагательное донкихотский, идеалистический, далёкий от реальности

Большой англо-русский словарь

Quixotic

adjective Etymology: Don Quixote 1. foolishly impractical especially in the pursuit of ideals; especially marked by rash lofty romantic ideas or extravagantly chivalrous action 2. capricious, unpredictable Synonyms: see imaginaryquixotical adjectivequixotically adverb

Merriam-Webster's Collegiate Dictionary