👉 In English, "undeceives" means to deceive someone into believing or accepting something that is not true. It's a phrase used in various contexts to describe a dishonest act of deception or manipulation intended to mislead or deceive someone into thinking they are being deceived. For example, if you tell someone you have a good deal on a product but it turns out to be a scam, this would be an example of deceiving them with the intention of misleading them into believing that there is something wrong