deceiving

When someone deceives another person, they are tricking or misleading them into believing something that isn't true.

The word "deceiving" is often used to describe situations where someone is intentionally trying to fool or manipulate others. For example, a salesperson might be deceiving customers by exaggerating the benefits of their product. Or, a friend might be deceiving another friend by saying they're going to meet up when actually they have no intention of showing up. Sometimes, people even deceive themselves, like when they convince themselves that something is true just because it sounds good or makes them feel better.