knap

verb
  1. To shape a piece of stone, especially flint, by striking it with another stone to produce sharp edges or tools. verb
    The archaeologist demonstrated how to knap flint to create a sharp blade.
    Early humans would knap stones to make tools for hunting and cutting.
  2. A small hill or a hillock. noun
    The cottage was nestled at the base of a grassy knap.
    From the top of the knap, they could see the entire valley spread out below.