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therewith

[th air-with, -with ] /ˌðɛərˈwɪθ, -ˈwɪð/
adverb
1.
with that.
2.
in addition to that.
3.
following upon that; thereupon.
Origin of therewith
900
before 900; Middle English ther(e)with, Old English thǣrwith. See there, with
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for therewith

therewith

/ˌðɛəˈwɪθ; -ˈwɪð/
adverb
1.
(formal) with or in addition to that
2.
a less common word for thereupon (sense 1)
3.
(archaic) by means of or on account of that
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 therewith

Old English þær wiþ; see there + with.

Online Etymology Dictionary, © 2010 Douglas Harper
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18
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