ㄧㄢˊyánˊérㄧㄡˇyǒuㄒㄧㄣˋxìn

  1. 說話誠實信用論語·》:朋友言而有信。」·景雲南西廂·三五》:老夫小姐甘心言而有信因此上不敢。」出爾反爾言而無信

to speak and keep one's promise (idiom)​; as good as one's word
(expr. idiom.)​ tenir sa promesse