Densely

The city streets were densely crowded with pedestrians.

The novel described a densely populated city with towering skyscrapers.

The ants formed a densely packed line as they carried food back to their colony.

The densely populated street was bustling with activity.

The city streets were densely lined with shops and restaurants.

The city is densely populated with tall buildings.

The city's downtown area is densely populated with tall skyscrapers.