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whereof

[hwair-uhv, -ov, wair-]
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adverb, conjunction
  1. of what, which, or whom.

Origin of whereof

First recorded in 1150–1200, whereof is from the Middle English word wherof. See where, of1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for whereof

Historical Examples

  • Betty heard this speech, whereof she only fully understood the end, and trembled.

    Fair Margaret

    H. Rider Haggard

  • Whereof this letter, sealed with our affixed seal, is witness.

    Albert Durer

    T. Sturge Moore

  • The only result was that the Bishop lost 500, whereof 300 were subscribed by the people.

  • Whereof, by your light, you can judge and see that it is darkness.

  • The devise of the Embassage from Lubber-land, whereof also a parte was made.

British Dictionary definitions for whereof

whereof

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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for whereof

adv.

c.1200, from where + of. Cf. Swedish hveraf, Danish hvoraf, Dutch waarvan.

Online Etymology Dictionary, © 2010 Douglas Harper