说一不二

说一不二:

Literally means:

mean what one says stand by one's words

Actually means:

It means that one is true to his words or promises. It is used to indicate that one acts in good faith and keeps his promises in his interaction with other people. It also emphasizes that one adheres to ones' duties or promises and never gives them up, thus convincing others of his trustworthiness. Commendatory.

It describes a person who speaks or behaves in an overbearing manner and never listens to others' opinion.

形容一个人说话算数，说了就不改变。强调在和别人的交往中讲信用,答应的事一定办，不会反悔，或者对要做或所做的事，一定坚持到底，直到做成为止。让人感到值得信赖。具有褒义色彩。

形容一个人说话做事霸道，要别人都听他的话，而他却不听别人的意见。