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counterpart

/ˈkaʊntəˌpɑːt/ noun

Latin root: contra Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about counterpart at Wordnik → Where our words come from →

  1. A person or thing having the same function or characteristics as another.
  2. A duplicate copy.

Origin

From Middle English conterpart, countre parte (“duplicate of a legal document”), equivalent to counter- + part. Compare Old French contrepartie, itself from contre (“facing, opposite”) (from Latin contra (“against”)) + partie (“copy of a person or thing”) (originally past participle of partīre (“to divide”)).

From Wiktionary, via Kaikki.org (CC BY-SA)