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fallacious

[fuh-ley-shuh s] /fəˈleɪ ʃəs/
adjective
1.
containing a fallacy; logically unsound:
fallacious arguments.
2.
deceptive; misleading:
fallacious testimony.
3.
disappointing; delusive:
a fallacious peace.
Origin of fallacious
1500-1510
1500-10; < Latin fallāciōsus deceitful, deceptive. See fallacy, -ous
Related forms
fallaciously, adverb
fallaciousness, noun
nonfallacious, adjective
nonfallaciously, adverb
nonfallaciousness, noun
unfallacious, adjective
unfallaciously, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for fallacious

fallacious

/fəˈleɪʃəs/
adjective
1.
containing or involving a fallacy; illogical; erroneous
2.
tending to mislead
3.
delusive or disappointing: a fallacious hope
Derived Forms
fallaciously, adverb
fallaciousness, noun
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 fallacious
adj.

c.1500, from fallacy (Latin fallacia) + -ous. Related: Fallaciously; fallaciousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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