jungle

Concise Oxford English Dictionary © 2008 Oxford University Press:
jungle/ˈʤʌŋɡl/

▶noun

• 1 an area of land with dense forest and tangled vegetation, typically in the tropics.

• 2 a very competitive or complex situation or place.

• 3 (also jungle music) a style of dance music with very fast electronic drum tracks and slower synthesized bass lines.

– phrases
the law of the jungle the principle that those who are strongest and most selfish will be most successful.

– derivatives
jungled adjective,
junglist noun & adjective,
jungly adjective.

– origin C18: via Hindi from Sanskrit jāṅgala ‘rough and arid (terrain)’.