Unimpeachable

Beyond credible doubt or criticism because integrity is exceptionally strong.

Reach for it when Praising a person's conduct, character, or reputation after careful scrutiny.

Her unimpeachable independence reassured both sides of the land dispute.

• warm

  exemplary

  conduct offers a model worth following

  not when does not mean every criticism would fail

• formal

  irreproachable

  conduct invites no justified blame

  not when not primarily about factual reliability

• literary

  incorruptible

  integrity cannot be bought or degraded

  not when stronger and narrower than general good character

Too reliable or authoritative to be called into question.

Reach for it when Describing evidence, credentials, or a source with decisive credibility.

The survey rested on unimpeachable records from three independent archives.

• playful

  rock-solid

  informal praise for dependable evidence

  not when too casual for judicial or scholarly contexts

• professional

  authoritative

  expert standing makes a source dependable

  not when authority can still be mistaken

• formal

  indisputable

  a claim cannot reasonably be denied

  not when describes the claim rather than its source

• reproachable
• corrupt
• questionable

• unimpeachable integrity

  Unimpeachable integrity made Chen the obvious choice to oversee the recount.

• unimpeachable source

  An unimpeachable source confirmed the manuscript's chain of custody.

• unimpeachable evidence

  The dated negatives supplied unimpeachable evidence of the earlier design.