fanciful; ideal; im practicable; impractical; moot; not correspond to reality; out of touch with reality; romantic;screwy;starry-eyed; unrealistic ❍ 对他的诺言不应当存有任何～的幻想。Don’t cherish any fanciful illusions about his promise.
不切实际
unrealistic; impractical; impracticable 这种想法～。The idea flies in the face of reality./～的高指标unrealistically high target/～的计划impractical plan/～的幻想illusion