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plausible

[plaw-zuh-buh l] /ˈplɔ zə bəl/
adjective
1.
having an appearance of truth or reason; seemingly worthy of approval or acceptance; credible; believable:
a plausible excuse; a plausible plot.
2.
well-spoken and apparently, but often deceptively, worthy of confidence or trust:
a plausible commentator.
Origin
1535-1545
1535-45; < Latin plausibilis deserving applause, equivalent to plaus(us) (past participle of plaudere to applaud) + -ibilis -ible
Related forms
plausibility, plausibleness, noun
plausibly, adverb
nonplausibility, noun
nonplausible, adjective
nonplausibleness, noun
nonplausibly, adverb
overplausible, adjective
overplausibleness, noun
overplausibly, adverb
superplausible, adjective
superplausibleness, noun
superplausibly, adverb
unplausible, adjective
unplausibleness, noun
unplausibly, adverb
Synonyms
1. Plausible, specious describe that which has the appearance of truth but might be deceptive. The person or thing that is plausible strikes the superficial judgment favorably; it may or may not be true: a plausible argument (one that cannot be verified or believed in entirely). Specious definitely implies deceit or falsehood; the surface appearances are quite different from what is beneath: a specious pretense of honesty; a specious argument (one deliberately deceptive, probably for selfish or evil purposes).
Antonyms
1. honest, sincere.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un plausibly

plausible

/ˈplɔːzəbəl/
adjective
1.
apparently reasonable, valid, truthful, etc: a plausible excuse
2.
apparently trustworthy or believable: a plausible speaker
Derived Forms
plausibility, plausibleness, noun
plausibly, adverb
Word Origin
C16: from Latin plausibilis worthy of applause, from plaudere to applaud
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for un plausibly

plausible

adj.

1540s, "acceptable, agreeable," from Latin plausibilis "deserving applause, acceptable," from plaus-, past participle stem of plaudere "to applaud" (see plaudit). Meaning "having the appearance of truth" is recorded from 1560s. Related: Plausibly.

Online Etymology Dictionary, © 2010 Douglas Harper
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