adjective
- capable of being challenged, questioned, or disputed
Usage: formal
Examples
- The witness’s testimony was impugnable due to several inconsistencies.
- His reputation remained impugnable after the scandal broke.
- The research findings were impugnable because of flawed methodology.
- The contract’s validity is impugnable under current law.
- Her motives for the donation were impugnable given her business interests.
- The evidence presented was highly impugnable and unconvincing.