An archaic term for approval or approbation; a proof that something is good or valid.
Variant of 'approval' that blends 'approbation' and 'proof.' From Old French and Latin roots relating to approval and testing/proving something's worth.
This wonderfully archaic word shows how 'proof' originally meant 'testing'—'approof' was proof that something met standards, which is why we 'test' things to see if they work.
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