IPA: /ˈskæf.əldɪŋ/
KK: /ˈskæf.əʊl.dɪŋ/
A temporary structure made of wood or metal that supports workers and materials during the construction or repair of buildings.
The workers climbed up the scaffolding to reach the top of the building.
Scaffolding → It is formed from "scaffold" (from Old French *escalfaut*, meaning a temporary structure for support) and the suffix "-ing" (indicating the action or process). The word "scaffolding" refers to the process or system of using temporary structures to support work on buildings or other constructions.
Think of a 'temporary structure' ('scaffold') that helps support work being done — that's what scaffolding means.