impeccable

adj

1. Perfect, without faults, flaws or errors

   “He grew up in Norway, but he writes impeccable English.”

   “The only impeccable writers are those who never wrote.”

2. Incapable of wrongdoing or sin; immaculate

   “It was easy for James V to imprison Lady Glamis, but actually convicting her was far more difficult; her character was impeccable and she was highly respected by all who knew her.”