**Here are some examples of using the word «untrue» in English:**
1. It was untrue that he had stolen the money. He was innocent.
2. She accused me of being dishonest, but it was completely untrue. I have never lied to her.
3. The rumors about his illness were untrue. He is perfectly healthy.
4. He claimed to have climbed Everest, but I found out later that it was untrue.
5. Her story about meeting a celebrity was obviously untrue. I didn't believe a word of it.
6. The newspaper article contained several untrue statements. It misrepresented the facts.
7. He tried to convince everyone that he was a successful businessman, but in reality, it was all untrue. His business was failing.
8. She claimed to have been at the concert, but her testimony was untrue. She was not there.
9. The advertisement made several untrue promises about the product.
10. He accused me of betraying him, but it was untrue. I had never done anything to harm him.
In each of these examples, «untrue» is used to indicate that something is false or not accurate.