the fact or quality of being strongly loyal in supporting a person, organization, or set of beliefs or opinions

I admire her staunchness and fidelity. 我钦佩她的坚定和忠诚。

With a staunchness imbued in them since childhood, the family just carried on. 由于从小就被灌输了坚定的信念，这个家庭还在努力地维持。