noun, noun or participle which takes 'suru', transitive verb
Refers to the act of digging or excavating earth, rock, or other materials, often in construction, mining, or archaeological contexts. Can be used as a noun or with する as a transitive verb.
トンネル建設のため、山の掘削が始まった。
Excavation of the mountain began for the tunnel construction.
They excavated the ruins and discovered ancient artifacts.