impractical

Compared meaning: foolish, not sensible or workable (adjective).

比较义项：愚蠢的，不切实际的（形容词）。

• crazy

  Stronger and more informal than impractical; expresses a subjective judgment that an idea or plan is foolish, often with surprise or disbelief, rather than a neutral assessment of feasibility.

  比impractical语气更强烈、更口语化，表达说话者认为某个想法或计划愚蠢的主观判断，常带有惊讶或难以置信的意味，而不是对可行性的中性评估。

  It would be crazy to quit your job without any savings.

  没有存款就辞职，那样做太愚蠢了。

• impractical 本词

  More neutral and formal than crazy; describes a plan or object as unrealistic or not workable for actual use, focusing on feasibility rather than expressing an emotional judgment.

  比crazy更中性、更正式，形容某个计划或事物不现实、不便于实际使用，侧重可行性，而非表达情绪化的评判。

  Wearing high heels to hike is completely impractical.

  穿高跟鞋去远足完全不切实际。

Both words describe an idea as foolish or unrealistic. Crazy is stronger and more informal, expressing surprise that something is so foolish. Impractical is more neutral and formal, focusing on whether something is workable, without judging it as foolish. Excludes crazy meaning 'mentally ill'.

这两个词在“愚蠢的，不切实际的”这一意义上相近，但crazy语气更强烈、更口语化，带有说话者觉得某想法荒唐或难以置信的主观情绪；impractical更中性、正式，侧重某事在现实中行不通或不实用，不一定带有“愚蠢”的评判。这里不比较crazy的“疯狂的，精神失常的”等其他意义。