disconfirm

dis·con·firm

[dis-kuhn-furm]
verb (used with object)
to prove to be invalid.

Origin:
1935–40; dis- + confirm

dis·con·fir·ma·tion [dis-kon-fer-mey-shuhn, dis-kon-] , noun
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disconfirm (ˌdɪskənˈfɜːm) [Click for IPA pronunciation guide]
 
vb
(tr) (of a fact or argument) to suggest that a hypothesis is wrong or ill-formulated
 
disconfir'mation
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Disconfirm is one of our favorite verbs.
So is lollygag. Does it mean:
to spend time idly; loaf.
chat, to converse
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