congest

The verb congest means to clog up and become blocked. It is frequently applied to a head cold, when your nose begins to congest. During rush hour the roadways begin to be congested, as they become blocked and vehicles slow down.

We know that "con-" means "together," and the Latin congestus, which is the source of the word congest, means "collected, heaped up." Something that is congested can certainly be thought of as heaped full of stuff. By 1758, the word had taken on the medical meaning of an "accumulation" — think of your nose during a cold! — and the idea of congest as referring to something "overcrowded" was noted in 1859, giving rise to the idea of overcrowded cities as congested.

Definitions of congest
  1. verb
    become or cause to become obstructed
    synonyms: back up, choke, choke off, clog, clog up, foul
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    Antonyms:
    unclog
    become or cause to become unobstructed
    types:
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    gum up
    stick together as if with gum
    crap up
    become obstructed or chocked up
    block, choke up, lug, stuff
    obstruct
    silt, silt up
    become chocked with silt
    type of:
    block, close up, impede, jam, obstruct, obturate, occlude
    block passage through
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