thereof

[thair-uhv, -ov]
adverb
1.
of that or it.
2.
from or out of that origin or cause.

Origin:
before 1000; Middle English therof, Old English thǣrof. See there, of1

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World English Dictionary
thereof (ˌðɛərˈɒv)
 
adv
1.  of or concerning that or it
2.  from or because of that

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

thereof
O.E. þær of; see there + of.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Something has been added this time around: dashing yachting caps, sailor hats
  and chic variations thereof.
Curving is usually a result of poor planning or the complete lack thereof.
Not to mention the increases thereof for any major decontamination of living
  areas due to the water.
We hanged our harps upon the willows in the midst thereof.
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