congested

Concise Oxford English Dictionary © 2008 Oxford University Press:
congested/kənˈʤestɪd/

▶adjective

• 1 so crowded as to hinder freedom of movement.

• 2 (of a part of the body) abnormally full of blood.

  ■ (of the respiratory tract) blocked with mucus.

– derivatives
congest verb,
congestion noun,
congestive adjective.

– origin ME (as congest in the sense ‘heap up, accumulate’): from L. congest-, congerere ‘heap up’, from con- ‘together’ + gerere ‘bring’.