Unimpeachable
adj.thoughtful, capableformal
Meaning 1
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.
Choose between these
3- warm
conduct offers a model worth following
not when does not mean every criticism would fail
- formal
conduct invites no justified blame
not when not primarily about factual reliability
- literary
integrity cannot be bought or degraded
not when stronger and narrower than general good character
Meaning 2
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.
Choose between these
3- playful
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
Said against
3- reproachable
- corrupt
- questionable
It naturally appears in
3- 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.
Where this comes from
- wiktionary, adjective: above suspicion or reproach opens in a new tab for meaning 1 · retrieved 2026-07-26
- wiktionary, adjective: impossible to doubt or discredit opens in a new tab for meaning 2 · retrieved 2026-07-26
The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.