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fallacious

[fuh-ley-shuhs]

Origin

adjective

containing a fallacy; logically unsound: fallacious arguments.

deceptive; misleading: fallacious testimony.

disappointing; delusive: a fallacious peace.

Origin:
1500–10; < Latin fallāciōsus deceitful, deceptive. See fallacy, -ous

Related forms

fal·la·cious·ly, adverb

fal·la·cious·ness, noun

non·fal·la·cious, adjective

non·fal·la·cious·ly, adverb

non·fal·la·cious·ness, noun

EXPAND

un·fal·la·cious, adjective

un·fal·la·cious·ly, adverb

COLLAPSE

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Fallacious is a GRE word you need to know.

So is appease. Does it mean:

to bring to a state of peace, quiet, ease, calm, or contentment; pacify or soothe; to satisfy, allay, or relieve

a brief account of an extensive subject; a summary

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Collins

World English Dictionary

fallacious (fəˈleɪʃəs)

—*adj*
1.	containing or involving a fallacy; illogical; erroneous
2.	tending to mislead
3.	delusive or disappointing: a fallacious hope

fal'laciously

—*adv*

fal'laciousness

—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

fallacious

c.1500, from L. fallacia (see fallacy) + -ous.

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Matching Quote

"There is a species of scepticism antecedent to all study and philosophy, which is much inculcated by Descartes and others, as a sovereign preservative against error and precipitate judgment. It recommends an universal doubt, not only of all our former opinions and principles, but also of our very faculties; of whose veracity, say they, we must assure ourselves, by a chain of reasoning, deduced from some original principle, which cannot be fallacious or deceitful.... The Cartesian doubt, therefore, were it ever possible to be attained by any human creature (as it plainly is not) would be entirely incurable; and no reasoning could ever bring us to a state of assurance and conviction upon any subject."

-David Hume

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