# unsure

> English word · Adjective · frequency rank #10,471

## Definitions
1. uncertain, ambivalent.
2. unstable or precarious

## Etymology
From Middle English unsure, equivalent to un- + sure. Piecewise doublet of insecure and unsecure.

## Easily confused with
- **usurp** (https://plainspell.com/en/vs/unsure-vs-usurp)
- **upsurge** (https://plainspell.com/en/vs/unsure-vs-upsurge)
- **undue** (https://plainspell.com/en/vs/undue-vs-unsure)
- **unsee** (https://plainspell.com/en/vs/unsee-vs-unsure)
- **unsafe** (https://plainspell.com/en/vs/unsafe-vs-unsure)
- **unsung** (https://plainspell.com/en/vs/unsung-vs-unsure)

## Common misspellings (8)
`nusure`, `unnsure`, `unsrue`, `unssure`, `unsuer`, `unsurre`, `unusre`, `usnure`

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