This is the 6409th most frequent Chinese word.
拥挤
Crowded; congested.
Here, '拥挤' describes the state of the bus being crowded and full of people.
公交车上非常拥挤。
The bus is very crowded.
In this sentence, '拥挤' indicates the mall's overcapacity and large number of visitors.
周末商场总是拥挤不堪。
The mall is always unbearably crowded on weekends.
'拥挤' here is used to describe the traffic situation where vehicles are densely packed and difficult to move.