unswervable
/ʌnˈswəːvəbl
/adjective
Not changing or becoming weaker; unswerving: their unswervable faith sustained them...
- Jim could not help warming to the minister for his unswervable faith.
- Like a lynx scenting its quarry, the borderman started on the trail, tireless and unswervable.
- From his Army days Haast has preserved an unswervable faith in the efficacy of secrets.