adjective Archaic.

1605–15; un-1 + conceivable

unconceivableness, noun
unconceivably, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Such an unfair and humiliating approach is totally unconceivable for us.
It is an unconceivable evil that would violently target those who volunteer to bring goodwill and peace to a nation.
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