renege
US /rɪˈneɡ/
UK /rɪˈneɡ/

1.
manquer à, renier
go back on a promise, undertaking, or contract
:
•
He reneged on his promise to pay back the loan.
Il a manqué à sa promesse de rembourser le prêt.
•
The company reneged on the agreement at the last minute.
L'entreprise a rompu l'accord à la dernière minute.