1. (

• 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"; "a straight and narrow tree-lined road unswerving across the lowlands" ;

2. (

• undeviating

) used of values and principles; not subject to change; steady; "undeviating loyalty" ;