# ninety

> English word · Numeral · IPA /ˈnaɪn.ti/ · frequency rank #11,078

## Definitions
1. The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.

## Etymology
From Middle English nynty, nynety, from Old English hundniġontiġ, from Proto-Germanic *newuntēhundą (“ninety”), equivalent to nine + -ty. Cognate with Scots nynty, nynety (“ninety”), Saterland Frisian njuugentich (“ninety”), West Frisian njoggentich (“ninety”), Dutch negentig (“ninety”), German Low German negentig (“ninety”), German neunzig (“ninety”), Swedish nittio (“ninety”), Norwegian Bokmål nitti (“ninety”), Norwegian Nynorsk nitti (“ninety”), Icelandic níutíu (“ninety”).

## Easily confused with
- **ninth** (https://plainspell.com/en/vs/ninety-vs-ninth)
- **nitty** (https://plainspell.com/en/vs/ninety-vs-nitty)
- **nine** (https://plainspell.com/en/vs/nine-vs-ninety)
- **nifty** (https://plainspell.com/en/vs/nifty-vs-ninety)
- **Nieto** (https://plainspell.com/en/vs/nieto-vs-ninety)
- **nines** (https://plainspell.com/en/vs/nines-vs-ninety)
- **nicely** (https://plainspell.com/en/vs/nicely-vs-ninety)
- **naivety** (https://plainspell.com/en/vs/naivety-vs-ninety)

## Common misspellings (9)
`innety`, `nienty`, `ninetty`, `ninetyy`, `nineyt`, `ninnety`, `nintey`, `nniety`, `nninety`

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