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unnerve

[uhn-nurv] /ʌnˈnɜrv/
verb (used with object), unnerved, unnerving.
1.
to deprive of courage, strength, determination, or confidence; upset:
Fear unnerved him.
Origin
1595-1605
1595-1605; un-2 + nerve
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un nerve

unnerve

/ʌnˈnɜːv/
verb
1.
(transitive) to cause to lose courage, strength, confidence, self-control, etc
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 un nerve

unnerve

v.

1620s, "to destroy the strength of," from un- (2) + nerve. Meaning "to deprive of courage" is recorded from 1704. Related: Unnerved; unnerving.

Online Etymology Dictionary, © 2010 Douglas Harper
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