暢通

畅通
chàngtōng
unobstructed; unimpeded; free-flowing; smooth

CEDICT

Entry Composition

1 暢 chàng
  1. free
  2. unimpeded
  3. smooth
  4. at ease
  5. free from worry
  6. fluent
2 通 tōng
  1. to go through
  2. to know well
  3. (suffix) expert
  4. to connect
  5. to communicate
  6. open
  7. to clear
  8. classifier for letters, telegrams, phone calls etc