one 's word does not express his idea
The Chinese idiom, Pinyin is C í B ù D á y ì, which means that words and articles can not express the meaning exactly. It's from the wedding ceremony.
Analysis of Idioms
Antonym: the meaning of a word is not reached; antonym: the meaning of a word must be true
Idiom usage
It is used as predicate, object and adverbial; it refers to improper expression examples language muddleheaded, which means words can't reach the meaning. (Volume 12 of tufenglu, written by Zhang Si in Qing Dynasty)
The origin of Idioms
It is said in the book of rites and betrothal gifts that "more words are history, less words are not achievement, and more words are enough to achieve justice."
one 's word does not express his idea
bring a romance to a happy ending - chéng rén zhī shàn
feel very depressed at the prospect - chù jǐng shāng qíng
be guilty of the most heinous crimes - zuì è tāo tiān