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]

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

取信赢得信任。例取信于民。英be trusted;[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]

背约违背原来的约定。例背约毁誓。英break an agreement; go back on one's word;[查看详情]