different between sunshining vs unshining

English

sunshining (not comparable)

(obsolete) Full of sunshine.
- 1620? 1621?, quoted in Azel Ames, The Mayflower and Her Log
  A fine, sunshining day like April. Party went aland betimes. Many ill both on ship and on shore.
- 1835, Frances Anne Butler, Journal (volume 2, page 183)
  The valley of the Mohawk, through which we crept the whole sunshining day, is beautiful from beginning to end […]

un- +? shining

unshining (comparative more unshining, superlative most unshining)

Not shining.
- 1915, Joseph Conrad, Victory
  Heyst noticed the good form of her brow, the dignity of its width, its unshining whiteness. It was a sculptural forehead.

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