quixotic
— Adjective
– English
～ not sensible about practical matters; idealistic and unrealistic; "as quixotic as a restoration of medieval knighthood"; "a romantic disregard for money"; "a wild-eyed dream of a world state"
quixotically
— Adverb
– English
～ in a quixotic manner; "sent to jail for two years, he has quixotically refused to clear himself by betraying his colleagues"
quixotism
— Noun
– English
～ quixotic (romantic and impractical) behavior