whereof

[ wair-uhv, -ov, hwair- ]

adverb

1. of what, which, or whom.

whereof

/ wɛərˈɒv /

adverb

1. of what or which person or thing?

pronoun

1. of which (person or thing)

   the man whereof I speak is no longer alive

Word History and Origins

Origin of whereof¹

First recorded in 1150–1200, whereof is from the Middle English word wherof. See where, of ¹

Example Sentences

Then again, Hice does have something of a history of mixing politics and religion, so at least he knows whereof he speaks.

From The Daily Beast

Moreover, as a former security chief he knows whereof he speaks.

From The Daily Beast

In faith whereof, we, the respective Plenipotentiaries, have signed this treaty and have hereunto affixed our seals.

From Project Gutenberg

The very moment he arrived I found myself again, I recognized my own existence, whereof I had not been conscious these ten years.

From Project Gutenberg

In witness whereof I have hereunto set my hand the day and year above written.

From Project Gutenberg

In witness whereof, the said party of the first part has hereunto set his hand and seal the day and year first above written.

From Project Gutenberg

In witness whereof, the parties to these presents have hereunto set their hands and seals.

From Project Gutenberg