unexceptionable unexceptionable /ˌʌnɪkˈsɛpʃənəbəl/

adjective

1. Completely acceptable; not open to exception or reproach  ( unexceptionable , unimpeachable )
   completely acceptable; not open to exception or reproach
    Two unexceptionable witnesses
   two unexceptionable witnesses
    A judge's ethics should be unexceptionable
   a judge's ethics should be unexceptionable