To fix the water pipe, the workers had to excavate beneath the sidewalk.
Excavate means to dig up, generally out of the ground. Example sentence: A bull dozer was used to excavate the foundation of the building.
It is difficult to excavate rocks from a building site.
the explorers continued to EXCAVATE the dirt for fossils.
The builders will excavate at the work site
The team of archaeolgists will now begin to excavate the site.
They used the backhoe to excavate the new basement. They were unable to excavate the car from the pond.
They decided to excavate the ruins.We need to excavate the road in order to lay down new pipes.
Normally they use drills and spades (not children's).
excavate
Mine , excavate ,
Excavate is not a prefix; it is a word. It does contain the prefix "ex-" which means "out" in this instance.
The noun forms of the verb to excavate are excavator, excavation, and the gerund, excavating.