different between unintermitted vs unremitting

English

un- +? intermitted

unintermitted (comparative more unintermitted, superlative most unintermitted)

(dated) Not intermitted; uninterrupted, ceaseless.
- 1888, Henry James, The Reverberator.
  The only action taken by Mr. Dosson in consequence of his elder daughter's revelations was to embrace the idea as a subject of daily pleasantry. He was fond, in his intercourse with his children, of some small usual joke, some humorous refrain; and what could have been more in the line of true domestic sport than a little gentle but unintermitted raillery upon Francie's conquest?

1728, un- +? remitting, from remit, from Latin [Term?], in now rare sense of “diminish, abate”. Not from (non-existent) *unremit.

unremitting (comparative more unremitting, superlative most unremitting)

incessant; never slackening
- 1961: J. A. Philip. Mimesis in the Sophistês of Plato. In: Proceedings and Transactions of the American Philological Association 92. p. 467.
  We can achieve this god?likeness only by unremitting and strenuous effort of the intellect.

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