Tunnel
A tunnel was an  passageway.

The Novans on Terra Nova lived for three generations in an underground network of tunnels and caves. In 2151, several tunnels collapsed when  crashed beneath the surface. ()

The catacombs beneath the Vulcan monastery at P'Jem were made of several tunnels. ()

While at Janus VI in the 2260s, Captain James T. Kirk and his first and science officer Spock encountered several tunnels created by a Horta, who was capable of moving through solid rock as easily as Humanoids could move through air. ()

Tunnels once formed part of the Phylosians' home. ()

In 2270, the crew of the  tried tunneling to escape the Lactra VII zoo, but were unsuccessful. ()

The terraforming science team on Velara III created artificial tunnels to start their project by using a laser drill. In one of their tunnels the away team of the   the "microbrain" lifeform. ()

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Architecture
Mining