# ensure

> English word · Verb · IPA /ɪnˈʃɔː(ɹ)/ · frequency rank #2,039

## Definitions
1. To make sure or certain of something (usually some future event or condition).
2. To make a pledge to (someone); to promise, guarantee (someone of something); to assure.

## Etymology
From Middle English ensuren, from Anglo-Norman enseurer, from Old French seur (“sure”). Doublet of insure.

## Easily confused with
- **entre** (https://plainspell.com/en/vs/ensure-vs-entre)
- **entire** (https://plainspell.com/en/vs/ensure-vs-entire)
- **erasure** (https://plainspell.com/en/vs/ensure-vs-erasure)
- **insure** (https://plainspell.com/en/vs/ensure-vs-insure)
- **ensue** (https://plainspell.com/en/vs/ensue-vs-ensure)
- **endure** (https://plainspell.com/en/vs/endure-vs-ensure)
- **encore** (https://plainspell.com/en/vs/encore-vs-ensure)
- **endured** (https://plainspell.com/en/vs/endured-vs-ensure)
- **enquire** (https://plainspell.com/en/vs/enquire-vs-ensure)

## Common misspellings (8)
`ennsure`, `ensrue`, `enssure`, `ensuer`, `ensurre`, `enusre`, `esnure`, `nesure`

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