jungle

A city or urban area, where the landscape is covered by pavement and the environment is alienating and unsafe.

Of a heart, to beat very fast, usually because of strong emotions.

An urban or other populated area containing a high density of buildings constructed of concrete or similar materials, especially one which lacks greenery and which seems unattractive, harsh, or unsafe.

A system used by primitive cultures in remote tropical regions for communication over long distances, such as drum sounds or a relay of runners.

The lion, Panthera leo.