unerring

She moves slyly among the bracken, and her exquisite scent serves to guide her unerringly as she works up wind.

At opposition time it will point directly and unerringly at Mars.

His sharp eyes followed a wide line of broken grasses, noting that it pointed unerringly toward those same heights.

There is a dial that unerringly marks 'the stately stoppings' of the sun of suns—let us regulate our belief by it.

Unerringly she picked out Muriel, though Marjorie had only gone over their names to her once by way of general introduction.