# tandem

> English word · Noun · IPA /ˈtændəm/ · frequency rank #14,434

## Definitions
1. A carriage pulled by two or more draught animals (generally draught horses) harnessed one behind the other, both providing pulling power but only the animal in front being able to steer.
2. Two draught animals (generally draught horses) harnessed one behind the other.
3. A thing with two components arranged one behind the other.
4. A thing with two components arranged one behind the other.
5. A hollow metal tube containing radioactive material, inserted through the vagina into the uterus to treat gynecological cancer.
6. A group of two or more machines, people, etc., working together; hence (uncountable), close collaboration.
7. A method of language learning based on mutual exchange, where ideally each learner is a native speaker in the language the other person wants to learn.

## Etymology
PIE word
 *téh₂m
The noun is borrowed from Latin tandem (“of time: at last, at length, finally”), applied humorously in English to two horses harnessed “at length” (that is, in a single line) instead of side-by-side. Tandem is derived from tam (“so, to such an extent”) + -dem (demonstrative suffix).
The adjective, adverb, and verb are derived from the noun.

## Easily confused with
- **tender** (https://plainspell.com/en/vs/tandem-vs-tender)
- **tended** (https://plainspell.com/en/vs/tandem-vs-tended)
- **tinder** (https://plainspell.com/en/vs/tandem-vs-tinder)
- **tanner** (https://plainspell.com/en/vs/tandem-vs-tanner)
- **tanker** (https://plainspell.com/en/vs/tandem-vs-tanker)
- **tanned** (https://plainspell.com/en/vs/tandem-vs-tanned)
- **tanked** (https://plainspell.com/en/vs/tandem-vs-tanked)

## Common misspellings (9)
`atndem`, `tadnem`, `tanddem`, `tandemm`, `tandme`, `tanedm`, `tanndem`, `tnadem`, `ttandem`

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