ignominious       
adjective  literary uk/ˌɪɡ.nəˈmɪn.i.əs/ us/ˌɪɡ.nəˈmɪn.i.əs/
 (尤指事件或行为)耻辱的,丢脸的
(especially of events or behaviour) embarrassing because of being a complete failure
  an ignominious defeat/failure/retreat 声誉扫地的落败/失败/撤退 
 Synonyms: disgracefulinglorious shameful