unimpeachable

Adjective

• completely acceptable; not open to exception or reproach
  • two unexceptionable witnesses
    
  • a judge's ethics should be unexceptionable
    

• free of guilt; not subject to blame
  • has lived a blameless life
    
  • of irreproachable character
    
  • an unimpeachable reputation
    

• beyond doubt or reproach
  • an unimpeachable source
    

Related words

• Synonyms: 
  unexceptionable , blameless , inculpable , irreproachable