curbstone
/ˈkɜrbstəʊn/Definitions
1. noun
a stone or block of stone set at the edge of a road or path, especially to form a kerb.
“The old curbstone along the sidewalk had been worn smooth by years of foot traffic.”
2. verb
to reduce or check the growth or development of something, especially a plant or a business.
“The company’s profits were curbed by the economic downturn.”