An archaic or obsolete term meaning to prove or test something, or to approve or verify something.
From Old French esprover or Latin approbare, with the prefix e- or es- meaning 'out.' The term disappeared from English as 'prove,' 'test,' and 'approve' became standard.
Esprove is basically a forgotten word for 'to prove'—it's totally superseded by simpler terms, showing how English language naturally sheds redundant words like an old snake skin!
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