To make a tunnel through or under something; to burrow.
To dig a tunnel.
To transmit something through a tunnel (wrapper for insecure or unsupported protocol).
To insert a catheter into a vein to allow long-term use.
To undergo the quantum-mechanical phenomenon where a particle penetrates through a barrier that it classically cannot surmount.
The act of burrowing a tunnel.
The practice of exploring tunnel.
The quantum mechanical passing of a particle through an energy barrier.
A type of fraud where assets and profits are transferred out of firms for the benefit of those who control them.
A feature of the file system that allows files to preserve certain properties, such as creation date, even after being deleted and recreated.