unimpeachable

/,ʌnim'pi:tʃəbl/
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unimpeachable

The source provided unimpeachable evidence for the research paper.

Definition
  1. Adjective:
    • Completely acceptable; not open to exception or reproach: Describes something or someone that is beyond criticism or fault, so good or correct that it cannot be questioned or doubted.
    • Free of guilt; not subject to blame: Describes a person whose character or behavior is entirely faultless and above suspicion.
    • Beyond doubt or reproach: Describes information or a source that is so reliable and trustworthy that it cannot be doubted.
Usage Examples
  • Describing a person's character or reputation:
    • Her integrity is unimpeachable; everyone trusts her completely.
    • He has an unimpeachable reputation in the scientific community.
  • Describing a source of information:
    • The journalist cited an unimpeachable source for the story.
    • We need unimpeachable evidence before we can proceed.
  • Describing something as flawless or beyond criticism:
    • The committee found his conduct to be unimpeachable.
    • She provided unimpeachable logic in her argument.
Advanced Usage
  • Legal/Formal Context: Often used in formal, legal, or official contexts to describe evidence, testimony, or a witness that is beyond any reasonable doubt or challenge.
    • The witness's unimpeachable testimony was crucial to the case.
  • Ethical/Moral Context: Used to describe a standard of behavior or ethics that is considered perfect and unassailable.
    • A public official should strive for unimpeachable ethics.
Variants and Related Words
  • Unimpeachably (adverb): In a manner that is beyond reproach.
    • The report was unimpeachably accurate.
  • Impeach (verb): To charge with a crime or misdemeanor; to cast doubt on. (This is the root word from which "unimpeachable" is formed, meaning "not able to be impeached").
Synonyms
  • Irreproachable: Free from blame or criticism.
  • Blameless: Innocent of wrongdoing.
  • Unassailable: Unable to be attacked, questioned, or defeated.
  • Faultless: Without any flaws or defects.
Antonyms
  • Questionable: Doubtful as to truth or quality.
  • Reprehensible: Deserving censure or condemnation.
  • Blameworthy: Responsible for wrongdoing and deserving of censure.
Related Idioms and Phrases
  • Beyond reproach: A common phrase with a very similar meaning to "unimpeachable," describing something that is perfect and cannot be criticized.
    • The accountant's record-keeping was beyond reproach.
  • Above suspicion: So honest or good that no one would suspect them of wrongdoing.
    • As a judge, she must remain above suspicion.
unimpeachable

The source provided unimpeachable evidence for the research paper.

Adjective
  1. completely acceptable; not open to exception or reproach
    • two unexceptionable witnesses
    • a judge's ethics should be unexceptionable
  2. free of guilt; not subject to blame
    • has lived a blameless life
    • of irreproachable character
    • an unimpeachable reputation
  3. beyond doubt or reproach
    • an unimpeachable source