unimpeachable
Cannot be questioned
Unimpeachable means beyond question or reproach—impossible to challenge or discredit.
An unimpeachable source is entirely trustworthy.
Unimpeachable credentials leave no room for doubt.
Her integrity was unimpeachable.
The word derives from impeach in its sense of calling into question, though it appears far more often than impeachable itself.
Free from deception
- honorableHaving high moral standards
- uprightVertical or morally sound
- principledHaving strong moral beliefs
- ethicalConforming to moral principles
incorruptible · virtuous · righteous · scrupulous · conscientious · moral · noble · sincere
Free from any defect
- faultlessFree from any defect
- flawlessEntirely without fault
- spotlessCompletely free of marks
- unblemishedFree from any defect
untarnished · unsullied · pristine · immaculate · perfect · exemplary · infallible · unerring
Worthy of confidence
- dependableWorthy of trust
- reliableConsistently performing as expected
- credibleWorthy of acceptance
- solidFirm matter state
proven · verifiable · substantiated · authenticated · confirmed · established · documented · certified
Held in high regard
- esteemedGreatly respected, admired
- distinguishedNotable and respected
- eminentHigh in rank, respected
- prominentEasily noticed or distinguished
illustrious · acclaimed · venerated · revered · lauded · celebrated · well-regarded · good standing
honest
Free from deception
- honorableHaving high moral standards
- uprightVertical or morally sound
- principledHaving strong moral beliefs
ethical · incorruptible · virtuous · righteous · scrupulous · conscientious · moral · noble · sincere · dignified
impeccable
Free from any defect
unblemished · untarnished · unsullied · pristine · immaculate · perfect · exemplary · infallible · unerring · unassailable
trustworthy
Worthy of confidence
- dependableWorthy of trust
- reliableConsistently performing as expected
- credibleWorthy of acceptance
solid · proven · verifiable · substantiated · authenticated · confirmed · established · documented · certified · validated
respected
Held in high regard
- esteemedGreatly respected, admired
- distinguishedNotable and respected
- eminentHigh in rank, respected
prominent · illustrious · acclaimed · venerated · revered · lauded · celebrated · well-regarded · good standing · untainted
- innocenceinnocent, innocence, purity, pure, blameless
- integrityintegrity, honesty, truthfulness, uprightness, rectitude
- uprightupright, erect, vertical, perpendicular, standing
unimpeachablequestionable
Of uncertain validity
dubious · unreliable · suspect · disreputable · untrustworthy
unimpeachableimpeachable
Subject to official charges
assailable · unreliable · doubtful · contestable · disputable
unimpeachableblameworthy
Deserving of censure
culpable · guilty · reproachable · blamable · blameful