The act of burrowing a tunnel.
The practice of exploring tunnel.
(physics) The quantum mechanical passing of a particle through an energy barrier.
(finance) A type of fraud where assets and profits are transferred out of firms for the benefit of those who control them.
(computing, Microsoft Windows) A feature of the file system that allows files to preserve certain properties, such as creation date, even after being deleted and recreated.
present participle and gerund of tunnel