quixotic
adjective
[ kwɪkˈsɒtɪk ]
• extremely idealistic; unrealistic and impractical.
• "a vast and perhaps quixotic project"
Similar:
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.