Look at this word, then see what mental picture you get: HAMMER. Like most people, you probably see a person's hand wrapped around a metal or wood stick with an object fixed on top. You may see this object being used to strike other objects. You may imagine the heaviness of the object. The word "hammer" is a mental shortcut that instantly conjures up all the memories and associations you have with that thing. Naming objects is useful.
But the names we give items also creates a barrier to innovative thinking. We have a difficult time seeing that object doing anything else than the task assigned to it. It is also difficult for us to imagine using other objects to do the job of a hammer. It is a condition called Functional Fixedness.