Words similar to underground

Example sentences for: underground

How can you use “underground” in a sentence? Here are some example sentences to help you improve your vocabulary:

The papers described canyoning as an "underground" sport with no official organization to check equipment, offer advice, or govern safety.
My prediction still holds: The ex-patriots in Miami will take this kid underground before they hand him over to Daddy.
A bustling underground network of concourses and escalators links the major buildings of the financial district to create a whole other neighborhood of shopping malls, cinemas, and restaurants, providing warm shelter in the winter and air-conditioned relief in the humid summer.
The Webzine the Underground makes it the day's feature story.
Many Russians who find Lenin's public resting place a macabre embarrassment think his soul will only rest (and theirs with it) once he goes underground.