# duplex

> English word · Adjective · IPA /ˈdu.plɛks/ · frequency rank #24,433

## Definitions
1. Double; made up of two parts.
2. Double; made up of two parts.
3. Double; made up of two parts.
4. Bidirectional (in two directions).
5. Having horizons with contrasting textures.

## Etymology
PIE word
 *dwóh₁
Borrowed from Latin duplex (“double, two-fold”), from duo (“two”) + plico (“fold together”); compare the roots of διπλόος (diplóos, “double”); compare also πλέκω (plékō, “twist, braid”). By surface analysis, duo- + -plex.

## Easily confused with
- **dupe** (https://plainspell.com/en/vs/dupe-vs-duplex)
- **duper** (https://plainspell.com/en/vs/duper-vs-duplex)
- **Dudley** (https://plainspell.com/en/vs/dudley-vs-duplex)

## Common misspellings (9)
`dduplex`, `dpulex`, `dulpex`, `dupelx`, `duplexx`, `dupllex`, `duplxe`, `dupplex`, `udplex`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/duplex