undeviating
adj/ʌnˈdiːvieɪtɪŋ/
Etymology From un- + deviating.
1
That does not deviate, veer or turn aside; unswerving.
2
That does not change; steady.
- And she had a yet harder lesson to learn—that nothing can supply the place of strong, undeviating principle.1837, L[etitia] E[lizabeth] L[andon], Ethel Churchill: Or, The Two Brides. […], volume III, London: Henry Colburn, […], →OCLC, pages 123–124:
- Derived terms
- undeviatingly, undeviatingness