different between unceasing vs unintermitted

English

un- +? ceasing

unceasing (comparative more unceasing, superlative most unceasing)

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?

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