The expedition team advanced through the dense jungle.
This area is covered in thick forest.
Internet slang; a playful reading of the kanji 密林 (dense forest) as a reference to the Amazon rainforest, used to refer to the online retailer Amazon.
I shopped on Amazon.
That product was selling cheap on Amazon.
The expedition team advanced through the deep jungle.
I bought that book on Amazon.
He lost his way and ended up wandering into the jungle.
The villagers cleared the dense forest to make a road.