驷不及舌话说出后，四匹马拉的车也追不回来指说话应当慎重。例子贡曰：“惜乎！夫子之说君子也驷不及舌。”——《论语颜渊》英what is said cannot be unsaid;[查看详情]

一言九鼎九鼎：古代国家的宝器象征九州。形容说的话分量大起决定作用。英solemn promise;[查看详情]

一言为定一句话说定，不再更改或反悔。例姐姐说的有理就是这等一言为定不可再改。——清文康《儿女英雄传》英that's settled then; once sth.is said,it must be kept;[查看详情]

覆水难收倒在地上的水难收回来。比喻事成定局无法挽回(多用于夫妻离异)例成媒不说覆水难收。——《敦煌变文集》英spilt water can’t be gathered up; what is done cannot be undone; it is hard to get it back again; water poured on the ground cannot be recovered;[查看详情]