1) Above suspicion 2) Beyond doubt or reproach 3) Completely acceptable 4) Free of guilt 5) Impossible to discredit 6) Not subject to blame 7) Unquestionable 1) Acceptable 2) Beyondsuspicion 3) Blameless 4) Faultless 5) Guiltless 6) Inculpable 7) Innocent 8) Irreproachable 9) Unexceptionable 10) Unquestionable 
• (a.) Not impeachable; not to be called in question; exempt from liability to accusation; free from stain, guilt, or fault; irreproachable; blameless; as, an unimpeachable reputation; unimpeachable testimony.
[adj] - beyond doubt or reproach
unimpeachable 1. Impossible to discredit or to challenge. 2. So good as to be beyond reproach. 3. Completely acceptable; not open to exception or to reproach. 4. Free of guilt; not subject to blame.
adjective beyond doubt or reproach; `an unimpeachable source`
above suspicion; impossible to discredit; impeccable: unimpeachable motives.
[SAT terms] beyond doubt or reproach beyond doubt or reproach[Intelligent words] beyond doubt or reproach beyond doubt or reproach