堵塞

dǔsè
  1. to clog up
  2. blockage

CEDICT

Entry Composition

1 堵 dǔ
  1. to block up (a road, pipe etc)
  2. to stop up (a hole)
  3. (fig.) (of a person) choked up with anxiety or stress
  4. wall (literary)
  5. (classifier for walls)
2 塞 sè (bound form) to block; to obstruct