# uncertain

> English word · Adjective · IPA /ʌnˈsɜːtən/ · frequency rank #7,299

## Definitions
1. Not certain; unsure.
2. Not known for certain; questionable.
3. Not yet determined; undecided.
4. Variable and subject to change.
5. Fitful or unsteady.
6. Unpredictable or capricious.

## Etymology
From Middle English uncerteyn. By surface analysis, un- + certain.

## Easily confused with
- **uncertainty** (https://plainspell.com/en/vs/uncertain-vs-uncertainty)

## Common misspellings (13)
`nucertain`, `ucnertain`, `unccertain`, `unceratin`, `uncerrtain`, `uncertainn`, `uncertani`, `uncertian`, `uncerttain`, `uncetrain`, `uncretain`, `unecrtain`, `unncertain`

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