爽约没有履行约会；失约。例郭伋还州尚不欺于童子；文侯校猎宁爽约于虞人？——李商隐《为张周封上杨相公启》一诺千金，岂容爽约？英fail to keep an appointment; break an appointment;[查看详情]

失约不去赴约。例不要失约。英fail to keep an appointment;[查看详情]

负约失信背约。英break a promise; go back on one's words;[查看详情]

食言违背诺言；失信。例尔无不信朕不食言。——《书汤誓》食言而肥。决不食言。英break one’s promise;[查看详情]

背信背弃信用。英perfidy; treachery; act in bad faith; breach of faith;[查看详情]

失信违背协议或诺言，丧失信用。例失信于人。英break one's promise;[查看详情]

违约不遵守条约、契约的规定。例违约行为要受处罚。英default; break a contract; violate a treaty; break off an engagement; break one's promise;[查看详情]