(to cause a hole etc) to become deep(er)

make depth greater

to cause (something, a person) to move from a (usual) place

knock loose

to take something away, off or out (from a place); to dismiss a person (which is more usual)

lift or move object; take off, away

to turn things over, move things about, while looking for something

ransack, search

to make a hollow or tunnel under (an area of ground); to weaken (health, confidence etc) gradually

weaken