English
Adjective
unforeknown (not comparable)
-  Not known in advance.
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1667,  John Milton,  Paradise Lost:- Foreknowledge had no influence on their fault, / Which had no less proved certain unforeknown.
 
 
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1912,  May Sinclair,  The Three Bront:- And, no doubt, it was destiny of a sort, unforeknown, deceitful, apparently malignant, that sent Charlotte back again to Brussels after her aunt's death.