tunnelling

/T AH1 N AH0 L IH0 NG/
verb
  1. 1

    To make a tunnel through or under something; to burrow.

  2. 2

    To dig a tunnel.

  3. 3

    To transmit something through a tunnel (wrapper for insecure or unsupported protocol).

  4. 4

    To insert a catheter into a vein to allow long-term use.

  5. 5

    To undergo the quantum-mechanical phenomenon where a particle penetrates through a barrier that it classically cannot surmount.

noun
  1. 1

    The act of burrowing a tunnel.

  2. 2

    The practice of exploring tunnel.

  3. 3

    The quantum mechanical passing of a particle through an energy barrier.

  4. 4

    A type of fraud where assets and profits are transferred out of firms for the benefit of those who control them.

  5. 5

    A feature of the file system that allows files to preserve certain properties, such as creation date, even after being deleted and recreated.

Source: https://en.wiktionary.org/wiki/tunnel, https://en.wiktionary.org/wiki/tunneling, https://en.wiktionary.org/wiki/tunnelling