# whereof

> English word · Conjunction · IPA /wɛəɹˈɒv/ · frequency rank #56,534

## Definitions
1. Of what.
2. Of which.
3. Of whom.
4. With or by which.

## Etymology
From Middle English wherof; equivalent to where + of. Compare the parallel formations of Swedish varav and Dutch waaraf.

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