undeviating undeviating /ˌʌndɪˈviːeɪtɪŋ/

adjective

1. Used of values and principles; not subject to change; steady  ( undeviating )
   used of values and principles; not subject to change; steady
    Undeviating loyalty
   undeviating loyalty
   
2. Going directly ahead from one point to another without veering or turning aside  ( undeviating , unswerving )
   going directly ahead from one point to another without veering or turning aside
    Some people see evolution as an undeviating upward march from simple organisms to the very complex
   some people see evolution as an undeviating upward march from simple organisms to the very complex
    A straight and narrow tree-lined road unswerving across the lowlands
   a straight and narrow tree-lined road unswerving across the lowlands