履り行こう不ふ能のう

noun

impossibility of performance; unenforceability

Legal term referring to a situation where a contractual obligation cannot be performed, making it unenforceable.

• 履り行こう不ふ能のうの場ば合あい、契けい約やくは解かい除じょされることがある。

  In cases of impossibility of performance, the contract may be rescinded.