架空|かくうkakuu[0]heiban (flat)

1. no-adjectivefictitious; imaginary; fanciful; fabricated
   あなたは本当ほんとうに幽霊ゆうれいを見みたのではない。それは架空かくうのものでしかなかったのだ。↗

   You didn't really see a ghost―it was only imaginary.
2. prenominal modifieraerial; overhead

• Synonym空想的くうそうてきNeutralNeutral word for utopian, daydream-like fantasy, with a dreamy nuance; 「架空」 simply stresses fabrication.
• Related観念的かんねんてきWrittenWritten/formal word for something that exists only as an idea, detached from reality; 「架空」 stresses being fabricated and nonexistent.
• Related荒唐無稽こうとうむけいWrittenWritten four-character idiom for absurd, groundless nonsense, strongly negative; 「架空」 is comparatively neutral.
• RelatedファンタスティックNeutralLoanword meaning fantastic — either whimsical or simply wonderful, with a positive ring; 「架空」 only means made-up.
• Related非現実的ひげんじつてきNeutralNeutral word for unrealistic things that would be hard to actually achieve; 「架空」 stresses being made up out of nothing.
• Related幻想的げんそうてきNeutralNeutral word for dreamlike, fairy-tale charm with aesthetic appeal; 「架空」 just means fabricated, with no such beauty.
• Antonym実在じつざいNeutralAntonym: real, actual existence — the direct opposite of the fabricated 「架空」.
• Antonym現実げんじつNeutralAntonym: reality, the hard facts before you, opposed to the made-up 「架空」.
• Antonym実体じったいWrittenWritten/formal antonym: substance or real entity, the opposite of 「架空」 as something fabricated out of nothing.

Use 「架空」 for something invented out of nothing, as in 「架空の人物」 or 「架空請求」; it also describes wires or cables strung overhead. For unrealistic ideas say 「非現実的」, for dreamy fantasy 「空想的」, and for what actually exists 「現実」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ロープやケーブル、線せんなどを空中くうちゅうに架け渡かけわたすこと。
2. 根拠こんきょのないこと。事実じじつに基もとづかず、想像そうぞうによってつくること。
3. 事実じじつに基もとづかず、想像そうぞうによってつくるさま。