(理屈词穷, 无话可说) be agape and tongue-tied; be at a loss for words; be stumped by ...; be unable to find anything to say; gaping and speechless; lose one's tongue; One's tongue glued itself to the roof of one's mouth.; One's tongue refused to move.; open the mouth and hold the tongue -- cannot answer; tongue-tied:
He was stumped by the questions and remained tongue-tied for a good while.
他被问得张口结舌, 半天说不出话来。
Brought before the evidence of his crimes, he was awe-struck and could say nothing in his defence.
罪证俱在, 他张口结舌, 无言以对。
短语:
(惊异得说不出话来) gape with astonishment [wonder]; gaping at with wonder