1) Capricious 2) Extravagantly chivalrous 3) Foolishly impractical 4) Hardly practical 5) Idealistic and unrealistic 6) Impractical 7) Impractically idealistic 8) Not at all practical 9) Romantic 10) Starry-eyed 11) Visionary in vain 12) Wild-eyed Found on https://www.crosswordclues.com/clue/quixotic
Quix·ot'ic (kwĭks*ŏt'ĭk) adjective Like Don Quixote; romantic to extravagance; absurdly chivalric; apt to be deluded. 'Feats of quixotic gallantry.' Prescott. Found on http://www.encyclo.co.uk/webster/Q/13
romanticadjective not sensible about practical matters; unrealistic; `as quixotic as a restoration of medieval knighthood`; `a romantic disregard for money`; `a wild-eyed dream of a world state` Found on https://www.encyclo.co.uk/local/20974
(sometimes cap.) resembling or befitting Don Quixote. · extravagantly chivalrous or romantic; visionary, impractical, or impracticable. · impulsive and often rashly unpredictable. Found on https://www.infoplease.com/dictionary/quixotic