An adze-on-block hieroglyph is a special picture that the ancient Egyptians used to write their language called hieroglyphs. It looks like a picture of a big block with a tool called an adze sticking out from the top.
Now, an adze is like a very big chisel that people used a long long time ago to cut wood and stone. It's a very important tool for Egyptians because they used it to make many things.
So, when the Egyptians wanted to write something about the adze, they would draw this special hieroglyph instead of writing the word. It's a bit like when you draw a picture of a dog instead of writing the word "dog".
The adze-on-block hieroglyph could mean a lot of different things, depending on the context. It could mean the actual tool itself, or it could mean the work that the tool was used for, like building a house or a temple.
Overall, the adze-on-block hieroglyph is a very special symbol that the ancient Egyptians used to communicate with each other through writing.