what is it?and what does burnishing mean?
Utilitarian would be stuff for everyday use, like ordinary dishware.
As in the previous answer utilitarian is everyday, functional pottery. Burnishing is smoothing the exterior of a piece of pottery before it has been fired. It is usually done while the piece is in the leatherhard state. When a piece has been burnished, it will not accept glaze.
Utilitarian means something that is useful. Like a plate, bowl, etc. Burnishing refers to the process of rubbing a ceramic piece with an object such as a smooth stone or a spoon. This process makes the object super smooth and shiny.