untruth

An untruth is a false statement or claim made by someone.

When we talk about an untruth, what we mean is that it's something said or believed to be true, but actually isn't. We often use this word when someone has intentionally misled us or tried to deceive us with false information. For example, if your friend tells you that they're going out of town for the weekend when in fact they're just staying home, that would be an untruth. It's not necessarily a malicious lie, but rather a mistake or a choice made to avoid hurting someone else's feelings. In everyday conversations, we might use phrases like "that's an untruth" or "what an untruth!" to express our surprise or skepticism at what was said.