ウソ

• 読み: ウソ
• ローマ字: uso
• 漢字の分解: 嘘 (lie/falsehood) → written in katakana when used as an exclamation of disbelief
• 発音: /ɯ.so/

意味

No way! You're kidding! — an exclamation of disbelief, not an accusation of lying.

While 嘘 (uso) literally means 'lie,' when exclaimed in conversation it functions purely as an expression of surprise or disbelief — like English 'no way!' or 'you're kidding!' The speaker is not accusing anyone of lying; they are reacting to unexpected news. Written in katakana (ウソ) or with an exclamation mark to emphasise the exclamatory function.

例文

1. え、ウソ！あの二人付き合ってるの？
2. ウソでしょ、もう終電ないの？
3. 合格したんだって！ウソ、すごいじゃん！

使い方ガイド

場面: friends, reactions, everyday conversation, social media

トーン: surprised, disbelieving, exclamatory

正しい言い方

• ウソ！マジで？信じられない！ (No way! Seriously? I can't believe it!)
• ウソでしょ、そんなことあるの？ (You're kidding, does that really happen?)

避ける言い方

• 目上の人に「ウソ！」だけだと失礼 — 「本当ですか？」を使う (Just saying 'uso!' to a superior is rude — use 'hontō desu ka?')

よくある間違い

• Thinking someone is accusing you of lying when they say ウソ — in exclamatory use it means 'no way!' not 'you're a liar'

起源と歴史

The word 嘘 (lie) has been used as an exclamation of disbelief for a long time in Japanese. The katakana spelling ウソ is preferred in casual writing to signal the exclamatory 'no way!' meaning rather than the literal 'lie' meaning.

文化的背景

時代: Long-established exclamation, used across generations

世代: All ages

社会的背景: Universal

地域メモ: Used across all of Japan. One of the most natural and reflexive reactions to surprising news.