IPA: /ˈkɜːrbɪŋ/
KK: /ˈkɜrbɪŋ/
A structure or material that forms the edge of a street or sidewalk, often made of stone or concrete.
The city installed new curbing along the road to improve safety for pedestrians.
Curbing → It is formed from "curb" (from Old French *curbe*, meaning a bend or curve) and the suffix "-ing" (indicating the action or process of). The word "curbing" refers to the action of bending or restraining something.
Think of the word 'curb' meaning to bend or restrain, and remember that 'curbing' is the action of doing just that.