# inside

> English word · Noun · IPA /ˈɪnsaɪd/ · frequency rank #657

## Definitions
1. The interior or inner part.
2. The left-hand side of a road if one drives on the left, or right-hand side if one drives on the right.
3. The side of a curved road, racetrack etc. that has the shorter arc length; the side of a racetrack nearer the interior of the course or some other point of reference.
4. The interior organs of the body, especially the guts.
5. A passenger within a coach or carriage, as distinguished from one upon the outside.
6. The inside scoop; information known only to certain involved people.

## Etymology
From Middle English ynneside; equivalent to in- + side.
Compare German Innenseite (“inside”), Danish inderside (“inside”), Swedish insida (“inside”), Dutch binnenzijde (“inside”), German Low German Binnensied, Binnersied (“inside”), Saterland Frisian Binnersiede (“inside”).

## Easily confused with
- **invite** (https://plainspell.com/en/vs/inside-vs-invite)
- **insist** (https://plainspell.com/en/vs/inside-vs-insist)
- **invade** (https://plainspell.com/en/vs/inside-vs-invade)
- **insure** (https://plainspell.com/en/vs/inside-vs-insure)
- **iodide** (https://plainspell.com/en/vs/inside-vs-iodide)
- **inspire** (https://plainspell.com/en/vs/inside-vs-inspire)
- **insider** (https://plainspell.com/en/vs/inside-vs-insider)
- **insides** (https://plainspell.com/en/vs/inside-vs-insides)
- **indie** (https://plainspell.com/en/vs/indie-vs-inside)
- **insane** (https://plainspell.com/en/vs/insane-vs-inside)
- **inline** (https://plainspell.com/en/vs/inline-vs-inside)
- **incite** (https://plainspell.com/en/vs/incite-vs-inside)
- **infidel** (https://plainspell.com/en/vs/infidel-vs-inside)

## Common misspellings (8)
`inisde`, `innside`, `insdie`, `insidde`, `insied`, `insside`, `isnide`, `niside`

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