Select the most appropriate meaning of the given idiom.

To add insult to injury

to make something worse

The most appropriate meaning of the idiom "to add insult to injury" is to make something worse.

The other options are incorrect.

• "To make fun of someone" is not the same as to add insult to injury. Making fun of someone is not necessarily making something worse.
• "To work hard on making up" is not the same as to add insult to injury. Working hard on making up is trying to make things better, not worse.
• "To wound physically" is not the same as to add insult to injury. Wounding someone physically is not necessarily making things worse.

The idiom "to add insult to injury" comes from the idea of adding insult to an injury that someone has already suffered. This means to make something bad even worse. For example, you might say that a person who lost their job was further insulted by their boss when they were told that they were not eligible for unemployment benefits.