Definition of "unerringly"

Unerringly impelling this dead, impregnable, uninjurable wall, and this most buoyant thing within; there swims behind it all a mass of tremendous life, only to be adequately estimated as piled wood is—by the cord; and all obedient to one volition, as the smallest insect.

1851 November 14, Herman Melville, “The Battering-ram”, in Moby-Dick; or, The Whale, 1st American edition, New York, N.Y.: Harper & Brothers; London: Richard Bentley, page 376

It proved the cue for a period of implosion from Wigan, who fell two behind shortly after the hour courtesy of Boyce's costly error, Young firing in unerringly from the spot.

2011 January 25, Les Roopanarine, “Wigan 1 - 2 Aston Villa”, in BBC‎