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unfounded

[uhn-foun-did]
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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.
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Origin of unfounded

First recorded in 1640–50; un-1 + found2 + -ed2
Related formsun·found·ed·ly, adverbun·found·ed·ness, noun

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

baselessunwarranteduntrueillogicalgratuitousspuriousuntruthfulunjustifiedgroundlessunsubstantiatedmisleadingdeceptivefalsefabricatedunprovenbottomlessfallaciousidlemendaciousuncalled-for

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British Dictionary definitions for unfounded

unfounded

adjective
  1. (of ideas, allegations, etc) baseless; groundless
  2. not yet founded or established
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Derived Formsunfoundedly, adverbunfoundedness, 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

Word Origin and History for unfounded

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

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Online Etymology Dictionary, © 2010 Douglas Harper