頓口無言

顿口无言
dùnkǒuwúyán

to have nothing to say in response

Wiktionary

Entry Composition

=1 頓 dùn
  1. to stop
  2. to pause
  3. to arrange
  4. to lay out
  5. to kowtow
  6. to stamp (one's foot)
  7. at once
  8. classifier for meals, beatings, scoldings etc: time, bout, spell, meal
=1 頓 dú used in 冒頓／冒顿 (Mòdú)
2 口 kǒu
  1. mouth
  2. classifier for things with mouths (people, domestic animals, cannons, wells etc)
  3. classifier for bites or mouthfuls
3 無言 wúyán
  1. to remain silent
  2. to have nothing to say