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whereof

[hwair-uhv, -ov, wair-] /ʰwɛərˈʌv, -ˈɒv, wɛər-/
adverb, conjunction
1.
of what, which, or whom.
Origin
1150-1200
1150-1200; Middle English wherof. See where, of1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for whereof
  • For the real price of labor is knowledge and virtue, whereof wealth and credit are signs.
  • Rick is our premier historian of the rise of modern movement conservatism, and knows whereof he speaks.
British Dictionary definitions for whereof

whereof

/wɛərˈɒv/
adverb
1.
of what or which person or thing?
pronoun
2.
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
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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
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16
15
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