Definition of "unfearing"

The little Dog learned, without more ado, And soon could sit upright and walk upright too; In deepest waters unfearing could spring, And whatever was lost could speedily bring.

1850, Edward Livermore, Phebe, The Blackberry Girl‎

What, perhaps, with other things, made Stubb such an easy-going, unfearing man, so cheerily trudging off with the burden of life in a world full of grave peddlers, all bowed to the ground with their packs; […]

1851 November 14, Herman Melville, “Knights and Squires”, in Moby-Dick; or, The Whale, 1st American edition, New York, N.Y.: Harper & Brothers; London: Richard Bentley, page 129

I feel that these old Northmen were looking into Nature with open eye and soul: most earnest, honest; childlike, and yet manlike; with a great-hearted simplicity and depth and freshness, in a true, loving, admiring, unfearing way.

1901, Conrad Hjalmar Nordby, The Influence of Old Norse Literature on English Literature‎