adjective
dense
DENS/dens/
Having components packed closely together.
The dense shrubs have overlapping branches that block the view.

Etymology
Latin densus already covered both crowded thickness and cloudiness, matching closely packed material and conditions difficult to see through. Its deeper origin is uncertain.
In context
a dense oily cloud of fish. [music playing] The sardines try to thwart the attack by banding together into a tight shimmering disco ball.
More examples
- Dense fog hides the far end of the bridge.
- This bread is denser than the light, airy rolls.
- The houses form a dense cluster around the station.
Forms
dense · denser · densest
density noun — The degree to which parts are packed together.
densely adverb — With parts packed closely together.