"congested" in the verb sense
1. clog, choke off, clog up, back up, congest, choke, foul
become or cause to become obstructed
"The leaves clog our drains in the Fall"
"The water pipe is backed up"
"congested" in the adjective sense
1. congested, engorged
overfull as with blood
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License