1. past tense of avouch; to declare or assert positively; to guarantee or vouch for
Usage: formal; somewhat archaic

Examples

• The witness avouched the defendant’s whereabouts during the crime.
• She avouched her commitment to the project despite the challenges.
• The expert avouched the authenticity of the ancient manuscript.
• He avouched his loyalty to the cause before the assembly.
• The document was avouched by three independent sources.
• The merchant avouched the quality of his goods to potential buyers.