契けい約やく不ふ履り行こう

noun

breach of contract; nonfulfillment of a contract

Legal term for failure to perform contractual obligations.

• 契けい約やく不ふ履り行こうにより損そん害がい賠ばい償しょうを請せい求きゅうされた。

  They were sued for damages due to breach of contract.