缄口无言

Explanation: Shut up: closed mouth. Mouth closed, do not speak. 　　Source: Original Song, Buddhism, Taoism, "Jing Chuan Deng recorded" Volume Twelve: "Teacher says: 'Ruruo not, the monk or shut up silent'." Thesaurus:  closely guard a secret, Avoided, silence, Du Port sufferance, to be frightened into complete silence but to exchange their hatred with eyes, speak with caution, confidentiality, stop talking unknown, silence, Kin 3 seal, secrecy, stop talking avoid, Shallow discretion croon, chops => lick. one's lips are sealed one will not or must not discuss or reveal sth Antonym Group:   broadcast the gossip, speak with fervor and assurance, Basanlansi, Tiaoba call [make] white black, Number of black on white, Number of black on yellow, criticism from the people boil, Introduction trilingual 4, On the number of black-yellow, Make irresponsible remarks, chat, talk irresponsibly, make thoughtless comments, That black spoken parts in an opera, talk of anything under the sun, On the air that there