頓口無言 dùnkǒuwúyán to be at a loss for words Origin Definitions Defs Strokes Stroke Words Sentences Sents 顿 頓 dùn suddenly suddenly; immediately; at once口 kǒu nounverb speech speech; words; one's tone of voice or accent无言 無言 wúyán adjective speechless; silent to remain silent; to have nothing to say; speechlessness