- 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"
--1 is one way to obstruct, obturate, impede, occlude, jam, block, close up
Derived form: noun congestion2
Somebody ----s something
Something ----s something