Definition of "tameless"

Then seemed it that a tameless hurricane / Arose, and bore me in its dark career / Beyond the sun, beyond the stars that wane / On the verge of formless space […] .

1817 December, Percy Bysshe Shelley, “The Revolt of Islam. […]”, in [Mary] Shelley, editor, The Poetical Works of Percy Bysshe Shelley. […], volume I, London: Edward Moxon […], published 1839, page 216

[W]hen the guard came to fetch the tameless convict, they found him on his knees in a corner, sobbing like a child.

1874, Marcus Clarke, For the Term of His Natural Life, Penguin, published 2009, page 278