# experiment

> English word · Noun · IPA /ɪkˈspɛɹ.ɪ.mənt/ · frequency rank #3,751

## Definitions
1. A test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy or likelihood of something previously untried.
2. Experience, practical familiarity with something.

## Etymology
From Middle English experiment, from Old French esperiment (French expérience), from Latin experimentum (“experience, attempt, experiment”), from experior (“to experience, to attempt”), itself from ex + *perior, in turn from Proto-Indo-European *per-.

## Easily confused with
- **experiments** (https://plainspell.com/en/vs/experiment-vs-experiments)
- **experimental** (https://plainspell.com/en/vs/experiment-vs-experimental)
- **expedient** (https://plainspell.com/en/vs/expedient-vs-experiment)

## Common misspellings (15)
`epxeriment`, `exepriment`, `expeirment`, `experiemnt`, `experimennt`, `experimentt`, `experimetn`, `experimment`, `experimnet`, `expermient`, `experriment`, `expperiment`, `expreiment`, `exxperiment`, `xeperiment`

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