Renege (verb)

1. To break a promise or fail to fulfill an agreement.
2. To go back on one's word or to retract a commitment.

Origin:

The word "renege" comes from the middle english word "reneggen" which is a combination of "re-" meaning again, and "neggen" meaning to deny or renounce. it refers to the act of breaking a promise or failing to fulfill an agreement.

Examples:

1. He reneged on his promise to pay back the money.
2. The company reneged on the contract, and the workers went on strike.
3. The politician reneged on his campaign promises.
4. He reneged on his agreement to help with the project.
5. She felt betrayed when he reneged on his promise to attend the event.