undeviating

Rubio has to date shown himself an undeviating follower of that program.

Sometimes a horseman may succeed in killing him by cutting across his undeviating course.

He then sent her to lurk upon the roof, strictly commanding her to keep an undeviating watch upon Heng-cho's movements.

I am certain that Lady Byrons first idea is, what is due to herself; I mean that it is the undeviating rule of her conduct.

He valued greatly the welcome of the woman whom he still loved with an undeviating fidelity.

And he had been clever enough to remain unmarried, so hope attended him with undeviating steps.