| a. | 1. | Not impeachable; not to be called in question; exempt from liability to accusation; free from stain, guilt, or fault; irreproachable; blameless; |
| Adj. | 1. | unimpeachable - beyond doubt or reproach; "an unimpeachable source" |
| 2. | unimpeachable - free of guilt; not subject to blame; "has lived a blameless life"; "of irreproachable character"; "an unimpeachable reputation" | |
| 3. | unimpeachable - completely acceptable; not open to exception or reproach; "two unexceptionable witnesses"; "a judge's ethics should be unexceptionable" Synonyms: unexceptionable |