闭口无言

Explanation: Closed his mouth, not words. Described as noncommittal on the matter or thing harden, but not anything else to say feel wrong when the modality. See "silent." 　　Source: Ming Shinai "Water Margin" sixty-fourth back off wins quickly Dali, closed silently, hands and feet flawless. "Qing Wu Jian" Strange two decades, "one hundred and fiftieth back right Zhu Bo's words, such as closed silent, only do not go." 　　Examples: Liu father and daughter left staring at each other, have found nothing to say; Shoko is ~. ★ Lao She, "Rickshaw Boy" fifth Thesaurus:  Blissful silence, quietly dumbness