The Word of the Day again comes from SACRED HUNGER by Barry Unsworth.
QUIXOTIC
ADJECTIVE
extremely idealistic; unrealistic and impractical.
"a vast and perhaps quixotic project"
synonyms: idealistic · unbusinesslike · romantic · extravagant · starry-eyed · visionary · utopian · perfectionist · unrealistic · unworldly · impracticable · unworkable · impossible · non-viable · inoperable · unserviceable · useless · ineffective · ineffectual · inefficacious
ORIGIN late 18th century: from Don Quixote+ -ic.