- fail to keep faith; eat one's words; fail to carry out one's promise; fail to live up to one's promise; go back on one's word; never to keep one's promise; not to keep one's word; One's words are not dependable [not trustworthy].
言而无信的用法和样例:
例句
可是你答应过要帮我们的忙,你这言而无信的小人!
But you promised to help us, you rat!