godan verb (-mu)
burrow through; dig through; tunnel through
Describes the action of digging forward through earth, rock, or similar material, often with a sense of making progress by digging.
モグラが地面を掘り進んでいる。
A mole is burrowing through the ground.
トンネル工事で山を掘り進む。
They dig through the mountain for tunnel construction.