The addition of words to make the sense clearer. The word is of Greek origin, formed from epi, 'in addition to,' and exegeesthai, 'to explain.' In the sentence, e.g., "Through Jesus, therefore, let us continually offer to God a sacrifice of praise—the fruit of lips that openly profess his name" (Heb. 13:15 NIB), the clause after the dash, "the fruit of . . . " is epexegetical; it was added to clarify what is meant by "a sacrifice of praice."
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