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implausible

[im-plaw-zuh-buh l] /ɪmˈplɔ zə bəl/
adjective
1.
not plausible; not having the appearance of truth or credibility:
an implausible alibi.
Origin of implausible
1595-1605
First recorded in 1595-1605; im-2 + plausible
Related forms
implausibility, implausibleness, noun
implausibly, adverb
Synonyms
unlikely, improbable, unbelievable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for implausible

implausible

/ɪmˈplɔːzəbəl/
adjective
1.
not plausible; provoking disbelief; unlikely
Derived Forms
implausibility, implausibleness, noun
implausibly, adverb
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 implausible
adj.

c.1600, from assimilated form of in- "not, opposite of" (see in- (1)) + plausible. Related: Implausibly.

Online Etymology Dictionary, © 2010 Douglas Harper
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