different between unturning vs upturning

English

unturning

From upturn +? -ing.

upturning

From Middle English upturnynge, equivalent to upturn +? -ing and/or up- +? turning.

upturning (plural upturnings)

A turning upward.
- 1973, Oliver Sacks, Awakenings
  He suffered from frequent 'micro-crises' — upturnings of the eyeballs, associated with transient inability to move or respond; these lasted a few seconds only, and occurred dozens, and sometimes hundreds, of times a day.

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