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fallacious
intractable

fal·la·cious

fallacious

 
 
pronunciation:
f leI shs
features:
Word Combinations (adjective), Word Parts
part of speech: adjective
definition: based on unsound logic; in error; illogical.
You've unfortunately based your essay on a fallacious argument.
antonyms:
correct, logical, sound
similar words:
illogical, irrational, mistaken, unsound
Word Combinations  About this feature
adverb + (adj.)fallacious absolutely, either, supposedly, totally, utterly
(adj.)fallacious + noun application, argument, assumption, belief, claim, example, identification, logic, notion, one, principle, promise, reasoning, statement, story, theory, truth, view
derivations: fallaciously (adv.), fallaciousness (n.)
Word Parts  About this feature
The word fallacious contains the following parts:
fall, fals Latin root that means to deceive
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-acious Latin adjective-forming suffix that means full of, characterized by
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The suffix -acious forms adjectives from Latinate nouns ending in "-acity," "-acy," or "-ce." Most common adjectives ending in -acious have a corresponding noun form ending in "-acity."