adjective

bringing shame or disgrace on someone or something.

his crimes are petty and dishonourable

disgraceful,shameful,shameless,shaming,disreputable,discreditable,degrading,debasing,ignominious,ignoble,blameworthy,contemptible,despicable,reprehensible,shabby,shoddy,sordid,sorry,base,low,improper,unseemly,unworthy,unprincipled,unscrupulous,corrupt,untrustworthy,treacherous,perfidious,traitorous,villainous,shady,crooked,low-down,dirty,rotten,rascally,scoundrelly,beastly,scurvy,knavish