What is a short sentence for the word of?

There isn't a single short sentence that perfectly encapsulates the meaning of "of". It's a very broad preposition with many uses, including:

* Possession: "The book *of* my friend"

* Part of a whole: "A piece *of* the cake"

* Material: "A statue *of* marble"

* Origin: "A song *of* the 1980s"

To understand the meaning of "of" in a specific sentence, you need to look at the context.

If you're looking for a synonym for "of", then depending on the context, you could use phrases like:

* Belonging to: "My friend's book"

* Made from: "A marble statue"

* From: "A 1980s song"

Ultimately, there's no single short sentence that can capture the full essence of "of".