爽约

shuǎngyuē

[fail to keep an appointment; break an appointment] 没有履行约会; 失约

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?