quixotic

Exceedingly idealistic; unrealistic and impractical, especially in pursuit of noble but impossible goals.

• quixotically/kwɪkˈsɒtɪkli/(adv)不切实际地
• quixotism/ˈkwɪksətɪzəm/(n)不切实际的行为

• quixotic quest
• quixotic dream
• quixotic idealism
• quixotic venture

1. 1.His quixotic plan to end world hunger through one fundraiser was admirable but unrealistic. (impractically idealistic)
2. 2.The quixotic campaign to save every endangered species simultaneously spread resources too thin. (noble but doomed)

• idealistic/aɪˌdɪəˈlɪstɪk/— pursuing high ideals
• utopian/juːˈtəʊpiən/— imagining perfect society
• impractical/ɪmˈpræktɪkəl/— not realistic

from Don Quixote, the idealistic hero of Cervantes's 1605 novel who tilted at windmills — used to describe noble but impractical idealism