hold/ stand firm
US /hoʊld fɜːrm / stænd fɜːrm/
UK /hoʊld fɜːrm / stænd fɜːrm/

1.
mantenerse firme, resistir
to maintain one's position or opinion steadfastly, especially in the face of opposition or difficulty
:
•
Despite the pressure, the company decided to hold firm on its pricing strategy.
A pesar de la presión, la empresa decidió mantenerse firme en su estrategia de precios.
•
The general ordered his troops to stand firm against the enemy's attack.
El general ordenó a sus tropas que se mantuvieran firmes ante el ataque enemigo.