From Longman Dictionary of Contemporary Englishirreproachableir‧re‧proach‧a‧ble /ˌɪrɪˈprəʊtʃəbəl◂ $ -ˈproʊtʃ-/ adjective formal GOOD/EXCELLENTsomething, such as someone’s behaviour, that is irreproachable is so good that you cannot criticize it
Examples from the Corpus
irreproachable• It may be a rather indigestible meal for some, but the performances that Gray elicits are irreproachable.• The private life of Charles I was irreproachable.• He would prove his good faith, his irreproachable character, once in the boat and on the waves.• In perfectly irreproachable South Carolina, which Fritz Hollings represents to its everlasting glory, the figure was 85 percent.• Only irreproachable sportsmanship makes this shortlist.• The government looked so vulnerable that even irreproachable traditionalists among the landowning nobility concluded that political reform was inescapable. 