back down
US /bæk daʊn/
UK /bæk daʊn/

1.
echarse atrás, ceder
withdraw a claim, demand, or commitment, or abandon one's position in an argument
:
•
He refused to back down on his decision.
Se negó a echarse atrás en su decisión.
•
Despite the pressure, she wouldn't back down from her principles.
A pesar de la presión, no cedería en sus principios.