impeccable impeccable /ˌɪmˈpɛkəbəl/

adjective

1. () Without fault or error  ( faultless , immaculate , incorrupted , impeccable )
   without fault or error
    Faultless logic
   faultless logic
    Speaks impeccable French
   speaks impeccable French
    Timing and technique were immaculate
   timing and technique were immaculate
    An immaculate record
   an immaculate record
   
2. Not capable of sin  ( impeccable )
   not capable of sin