Subterraneously

The sewer system channels wastewater subterraneously, preventing contamination of the environment.

The cat crept subterraneously into the room, trying to remain unnoticed.

The miners dug subterraneously, exploring the depths of the earth.

The creatures in the dark cave moved subterraneously, their eyes adapted to the lack of light.

The secret passage led subterraneously to a hidden room beneath the castle.

The subway trains travel subterraneously, transporting people underground.

The archaeological team excavated subterraneously, unearthing ancient artifacts.

The ants built their intricate tunnels subterraneously, creating a complex network beneath the ground.

The hidden laboratory was accessed subterraneously through a trapdoor in the basement.

The nocturnal creatures emerged subterraneously at night, foraging for food in the darkness.

The vampire's lair was subterraneously hidden beneath a dilapidated castle.

The miners worked subterraneously, exploring the depths of the earth.

The secret society held their meetings subterraneously, far away from prying eyes.

The author wrote subterraneously under a pen name to explore controversial topics without facing backlash.

The buried treasure was found subterraneously beneath the old oak tree.

The bunker was constructed subterraneously to provide shelter during wartime.