Adjective: unimpeachable ,ún-im'pee-chu-bul
- Completely acceptable; not open to exception or reproach
"two unimpeachable witnesses";
- unexceptionable
- Beyond doubt or reproach
"an unimpeachable source"
- Free of guilt; not subject to blame
"an unimpeachable reputation";
- blameless, inculpable, irreproachable
See also: acceptable, clean-handed, guiltless, innocent, unquestionable