Related formsun·found·ed·ly, adverbun·found·ed·ness, noun
Examples from the Web for unfounded
In this, I would later figure out that both of those concerns were unfounded.Neil deGrasse Tyson Breaks Down ‘Interstellar’: Black Holes, Time Dilations, and Massive Waves|Marlow Stern|November 11, 2014|DAILY BEAST
But it is unfounded fear by an American public at minimal risk of contracting the illness that is confounding those efforts.
Health officials , doctors and researchers roundly agree that these concerns are unfounded.Mississippi: Last In Everything, First In Vaccinations|Brandy Zadrozny|October 17, 2014|DAILY BEAST
One might wonder if Mario thinks that Judge Rakoff, too, had reached an “outrageous, unfounded conclusion” about his son.
Barry described the reports of him having affairs as “unfounded” and “crazy.”
He asserts, and no doubt with perfect truth, that these were unfounded.Historic Oddities|Sabine Baring-Gould
This report of the provisions of the city appeared, in the sequel, to be unfounded.Journal of a Residence at Bagdad|Anthony Groves
I can trust you, Antoinette; I shall have no suspicion, no unfounded jealousy of you.The Duchesse de Langeais|Honore de Balzac
I beg the owners of dogs not to be led away by so unfounded an opinion.The Dog|Dinks, Mayhew, and Hutchinson
Such is often fictitious and unfounded altogether, and should be treated with marked silence.Irene Iddesleigh|Amanda McKittrick Ros