The word “clunch” is a noun that primarily refers to a type of hard, dry material or clay used in building, especially in the context of construction in certain regions of England. It can also refer to a stone used for making mortar or a specific type of flint. In some dialects, “clunch” may also be used informally to describe a clumsy or awkward person. The term can have various uses depending on the context, particularly in regional dialects.