different between unkinking vs unwinking

English

unkinking

un- +? winking

unwinking (not comparable)

Not winking.
- 1954, C. S. Lewis, The Horse and His Boy, Collins, 1998, Chapter 6,
  […] what was now lying at his feet, and staring him out of countenance with its big, green, unwinking eyes, was the cat […]
(by extension) Constantly on one's guard; vigilant.
- 1792, Vicesimus Knox, Sermons, chiefly intended to promote Faith, Hope, and Charity
  All your anxious care, all your unwinking vigilance, is necessary to preserve you from your great adversary.

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