unswerving
adjective uk/ʌnˈswɜː.vɪŋ/ us/ʌnˈswɝː.vɪŋ/
（信任或信仰）坚定的，不懈的，始终如一的
If someone's trust or belief is unswerving, it is always strong and never becomes weaker.
unswerving loyalty/devotion/support/faith 始终如一的忠诚／奉献／支持／信念
Synonym: staunch