As I sit at my desk, the building around me throbs with rumbling, grinding sound, coming from somewhere off on another floor. This is called "drilling." Every so often we get a memo from the building manager saying that "drilling" will take place on a particular day at such and such a time, usually 7 to 9 AM. Nothing is ever said about who is doing the drilling, or why, or what is being drilled into, or why it has been going on for over a year.
It is simply "drilling."