different between unshare vs unshade

English

un- +? share

unshare (third-person singular simple present unshares, present participle unsharing, simple past and past participle unshared)

un- +? shade

unshade (third-person singular simple present unshades, present participle unshading, simple past and past participle unshaded)

(transitive) To remove a shade from.
- 1846, George Payne R. James, The step-mother: or, Evil doings
  […] remember, Miles, not to unshade the lantern till we are close to the entrance of the cave.
(graphical user interface, transitive) To restore a window from its shaded (collapsed) state.

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