不履行

プログレッシブ和英中辞典(第4版)

ふりこう【不履行】

nonfulfillment；《英》 nonfulfilment

約束の不履行
failure to keep a promise／(a) breach of promise

今日会議に欠席すれば義務の不履行になる
It would be a breach of duty if I didn't attend the meeting today.

契約の不履行
(a) breach of contract／nonfulfillment of a contract

債務の不履行
default (on a payment)／failure to pay [make payment]

契約不履行のため違約金を取られた
I had to pay a penalty for not fulfilling the terms of the contract.

出典　小学館「プログレッシブ和英中辞典(第4版)」