Etymograph

English

deduplicate

Deduplicate comes from Latin duplicātus ‘doubled, duplicated’, and goes back to duplex ‘twofold’.

  1. Latinc. 75 BCE–200 CEduplex1‘twofold’next step skipped: Latin duplicō
  2. Latinc. 75 BCE–200 CEduplicātus1‘doubled, duplicated’
  3. English1500–presentduplicate1
  4. Englishtodaydeduplicate1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English deduplicate

Lineage

  1. Latinc. 75 BCE–200 CEduplexWiktionary, English deduplicate‘twofold’next step skipped: Latin duplicō
  2. Latinc. 75 BCE–200 CEduplicātusWiktionary, English deduplicate‘doubled, duplicated’
  3. English1500–presentduplicateWiktionary, English deduplicate
  4. EnglishtodaydeduplicateWiktionary, English deduplicate

A compound of de- + duplicate

Latin dē ‘of; from’

English de-

Latin duplex ‘twofold’

Latin duplicātus ‘doubled, duplicated’

English duplicate

Linked words

through Latin duplex ‘twofold’

duplex, duplication, 2 more

through English duplicate

dupe

Today it means

verb To eliminate redundant duplicate data.

Sources

Sources: Wiktionary, “deduplicate”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Latin duplex / deduplicate

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