quixotic

quix-ot-ic/kwɪkˈsɑtɪk/US

adjective

1
Nobly idealistic to the point of being impractical.
Their quixotic plan to rebuild the pier by hand won more affection than funding.

From Don Quixote, the idealistic hero of Cervantes' 1605 novel.

Also useful for “quixotic”:Scrabble— High-value letters — see what it scores