# thereof

> English word · Adverb · IPA /ðɛˈɹʌv/ · frequency rank #10,622

## Definitions
1. Of this, that, or it.
2. From that circumstance or origin; therefrom, thence.

## Etymology
From Middle English thereof, therof, ther-of, ther of, from Old English þǣrof; equivalent to there + of. Compare Swedish därav.

## Easily confused with
- **theres** (https://plainspell.com/en/vs/thereof-vs-theres)
- **Theron** (https://plainspell.com/en/vs/thereof-vs-theron)
- **Theresa** (https://plainspell.com/en/vs/thereof-vs-theresa)
- **thereto** (https://plainspell.com/en/vs/thereof-vs-thereto)
- **thereon** (https://plainspell.com/en/vs/thereof-vs-thereon)
- **thermos** (https://plainspell.com/en/vs/thereof-vs-thermos)
- **there** (https://plainspell.com/en/vs/there-vs-thereof)
- **there's** (https://plainspell.com/en/vs/there-s-vs-thereof)
- **thereby** (https://plainspell.com/en/vs/thereby-vs-thereof)
- **therein** (https://plainspell.com/en/vs/therein-vs-thereof)
- **there'd** (https://plainspell.com/en/vs/there-d-vs-thereof)
- **therefor** (https://plainspell.com/en/vs/therefor-vs-thereof)

## Common misspellings (10)
`htereof`, `tehreof`, `theerof`, `therefo`, `thereoff`, `theroef`, `therreof`, `thhereof`, `threeof`, `tthereof`

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