disallow

[dis-uh-lou]
verb (used with object)
1.
to refuse to allow; reject; veto: to disallow a claim for compensation.
2.
to refuse to admit the truth or validity of: to disallow the veracity of a report.

Origin:
1350–1400; Middle English < Old French desallouer. See dis-1, allow

disallowable, adjective
disallowableness, noun
disallowance, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
disallow (ˌdɪsəˈlaʊ)
 
vb
1.  to reject as untrue or invalid
2.  to cancel
 
disal'lowable
 
adj
 
disal'lowance
 
n

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

disallow
late 14c., "to refuse to praise," from O.Fr. desalouer "to blame" (see dis- + allow); meaning "to reject" is from 1550s.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Officials can't use replay to disallow a basket for interference.
Most likely, though, there won't be enough genetic variance to disallow
  interbreeding.
What happens when some city council decides to disallow all protests.
But why should you disallow scientists to continue to explain to the public.
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