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unfounded

[uhn-foun-did] /ʌnˈfaʊn dɪd/
adjective
1.
without foundation; not based on fact, realistic considerations, or the like:
unfounded suspicions.
2.
not established; not founded:
the prophet of a religion as yet unfounded.
Origin
1640-1650
1640-50; un-1 + found2 + -ed2
Related forms
unfoundedly, adverb
unfoundedness, noun
Synonyms
1. groundless, idle, false, unjustified, unsubstantiated.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unfoundedness

unfounded

/ʌnˈfaʊndɪd/
adjective
1.
(of ideas, allegations, etc) baseless; groundless
2.
not yet founded or established
Derived Forms
unfoundedly, adverb
unfoundedness, 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 unfoundedness

unfounded

1640s, "having no foundation or basis," from un- (1) "not" + past participle of found (v.1).

Online Etymology Dictionary, © 2010 Douglas Harper
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